1
by brian
clean slate |
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/******************************************************
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Database log
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(c) 1995-1997 Innobase Oy
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Created 12/9/1995 Heikki Tuuri
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*******************************************************/
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#include "log0log.h" |
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#ifdef UNIV_NONINL
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#include "log0log.ic" |
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#endif
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#include "mem0mem.h" |
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#include "buf0buf.h" |
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#include "buf0flu.h" |
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#include "srv0srv.h" |
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#include "log0recv.h" |
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#include "fil0fil.h" |
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#include "dict0boot.h" |
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#include "srv0srv.h" |
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#include "srv0start.h" |
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#include "trx0sys.h" |
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#include "trx0trx.h" |
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/*
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General philosophy of InnoDB redo-logs:
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1) Every change to a contents of a data page must be done
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through mtr, which in mtr_commit() writes log records
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to the InnoDB redo log.
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2) Normally these changes are performed using a mlog_write_ulint()
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or similar function.
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3) In some page level operations only a code number of a
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c-function and its parameters are written to the log to
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reduce the size of the log.
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3a) You should not add parameters to these kind of functions
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(e.g. trx_undo_header_create(), trx_undo_insert_header_reuse())
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3b) You should not add such functionality which either change
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working when compared with the old or are dependent on data
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outside of the page. These kind of functions should implement
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self-contained page transformation and it should be unchanged
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if you don't have very essential reasons to change log
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semantics or format.
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*/
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/* Current free limit of space 0; protected by the log sys mutex; 0 means
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uninitialized */
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ulint log_fsp_current_free_limit = 0; |
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/* Global log system variable */
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log_t* log_sys = NULL; |
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#ifdef UNIV_DEBUG
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ibool log_do_write = TRUE; |
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ibool log_debug_writes = FALSE; |
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#endif /* UNIV_DEBUG */ |
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/* These control how often we print warnings if the last checkpoint is too
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old */
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ibool log_has_printed_chkp_warning = FALSE; |
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time_t log_last_warning_time; |
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#ifdef UNIV_LOG_ARCHIVE
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/* Pointer to this variable is used as the i/o-message when we do i/o to an
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archive */
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byte log_archive_io; |
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#endif /* UNIV_LOG_ARCHIVE */ |
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/* A margin for free space in the log buffer before a log entry is catenated */
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#define LOG_BUF_WRITE_MARGIN (4 * OS_FILE_LOG_BLOCK_SIZE)
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/* Margins for free space in the log buffer after a log entry is catenated */
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#define LOG_BUF_FLUSH_RATIO 2
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#define LOG_BUF_FLUSH_MARGIN (LOG_BUF_WRITE_MARGIN + 4 * UNIV_PAGE_SIZE)
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/* Margin for the free space in the smallest log group, before a new query
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step which modifies the database, is started */
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#define LOG_CHECKPOINT_FREE_PER_THREAD (4 * UNIV_PAGE_SIZE)
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#define LOG_CHECKPOINT_EXTRA_FREE (8 * UNIV_PAGE_SIZE)
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90 |
/* This parameter controls asynchronous making of a new checkpoint; the value
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91 |
should be bigger than LOG_POOL_PREFLUSH_RATIO_SYNC */
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#define LOG_POOL_CHECKPOINT_RATIO_ASYNC 32
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/* This parameter controls synchronous preflushing of modified buffer pages */
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#define LOG_POOL_PREFLUSH_RATIO_SYNC 16
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/* The same ratio for asynchronous preflushing; this value should be less than
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the previous */
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#define LOG_POOL_PREFLUSH_RATIO_ASYNC 8
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/* Extra margin, in addition to one log file, used in archiving */
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#define LOG_ARCHIVE_EXTRA_MARGIN (4 * UNIV_PAGE_SIZE)
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/* This parameter controls asynchronous writing to the archive */
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#define LOG_ARCHIVE_RATIO_ASYNC 16
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/* Codes used in unlocking flush latches */
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#define LOG_UNLOCK_NONE_FLUSHED_LOCK 1
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#define LOG_UNLOCK_FLUSH_LOCK 2
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/* States of an archiving operation */
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#define LOG_ARCHIVE_READ 1
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#define LOG_ARCHIVE_WRITE 2
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/**********************************************************
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Completes a checkpoint write i/o to a log file. */
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static
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void
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log_io_complete_checkpoint(void); |
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/*============================*/
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#ifdef UNIV_LOG_ARCHIVE
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/**********************************************************
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Completes an archiving i/o. */
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static
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void
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log_io_complete_archive(void); |
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/*=========================*/
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129 |
#endif /* UNIV_LOG_ARCHIVE */ |
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131 |
/********************************************************************
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Sets the global variable log_fsp_current_free_limit. Also makes a checkpoint,
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so that we know that the limit has been written to a log checkpoint field
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on disk. */
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void
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log_fsp_current_free_limit_set_and_checkpoint( |
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/*==========================================*/
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ulint limit) /* in: limit to set */ |
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{
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ibool success; |
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mutex_enter(&(log_sys->mutex)); |
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log_fsp_current_free_limit = limit; |
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mutex_exit(&(log_sys->mutex)); |
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/* Try to make a synchronous checkpoint */
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success = FALSE; |
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while (!success) { |
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success = log_checkpoint(TRUE, TRUE); |
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}
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}
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/********************************************************************
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Returns the oldest modified block lsn in the pool, or log_sys->lsn if none
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exists. */
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static
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dulint
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log_buf_pool_get_oldest_modification(void) |
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/*======================================*/
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{
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dulint lsn; |
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ut_ad(mutex_own(&(log_sys->mutex))); |
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lsn = buf_pool_get_oldest_modification(); |
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if (ut_dulint_is_zero(lsn)) { |
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lsn = log_sys->lsn; |
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}
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return(lsn); |
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}
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/****************************************************************
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Opens the log for log_write_low. The log must be closed with log_close and
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released with log_release. */
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184 |
dulint
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log_reserve_and_open( |
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186 |
/*=================*/
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/* out: start lsn of the log record */
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188 |
ulint len) /* in: length of data to be catenated */ |
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{
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log_t* log = log_sys; |
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ulint len_upper_limit; |
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#ifdef UNIV_LOG_ARCHIVE
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ulint archived_lsn_age; |
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ulint dummy; |
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195 |
#endif /* UNIV_LOG_ARCHIVE */ |
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#ifdef UNIV_DEBUG
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ulint count = 0; |
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#endif /* UNIV_DEBUG */ |
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199 |
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ut_a(len < log->buf_size / 2); |
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loop: |
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mutex_enter(&(log->mutex)); |
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/* Calculate an upper limit for the space the string may take in the
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log buffer */
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len_upper_limit = LOG_BUF_WRITE_MARGIN + (5 * len) / 4; |
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209 |
if (log->buf_free + len_upper_limit > log->buf_size) { |
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mutex_exit(&(log->mutex)); |
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/* Not enough free space, do a syncronous flush of the log
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buffer */
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log_buffer_flush_to_disk(); |
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srv_log_waits++; |
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ut_ad(++count < 50); |
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goto loop; |
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}
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225 |
#ifdef UNIV_LOG_ARCHIVE
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if (log->archiving_state != LOG_ARCH_OFF) { |
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archived_lsn_age = ut_dulint_minus(log->lsn, |
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log->archived_lsn); |
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if (archived_lsn_age + len_upper_limit |
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> log->max_archived_lsn_age) { |
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/* Not enough free archived space in log groups: do a
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synchronous archive write batch: */
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mutex_exit(&(log->mutex)); |
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ut_ad(len_upper_limit <= log->max_archived_lsn_age); |
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log_archive_do(TRUE, &dummy); |
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ut_ad(++count < 50); |
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goto loop; |
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}
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}
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#endif /* UNIV_LOG_ARCHIVE */ |
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248 |
#ifdef UNIV_LOG_DEBUG
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log->old_buf_free = log->buf_free; |
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log->old_lsn = log->lsn; |
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#endif
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return(log->lsn); |
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}
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/****************************************************************
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Writes to the log the string given. It is assumed that the caller holds the
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log mutex. */
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259 |
void
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260 |
log_write_low( |
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261 |
/*==========*/
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byte* str, /* in: string */ |
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ulint str_len) /* in: string length */ |
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264 |
{
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log_t* log = log_sys; |
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ulint len; |
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267 |
ulint data_len; |
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268 |
byte* log_block; |
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269 |
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270 |
ut_ad(mutex_own(&(log->mutex))); |
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part_loop: |
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272 |
/* Calculate a part length */
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273 |
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274 |
data_len = (log->buf_free % OS_FILE_LOG_BLOCK_SIZE) + str_len; |
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275 |
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276 |
if (data_len <= OS_FILE_LOG_BLOCK_SIZE - LOG_BLOCK_TRL_SIZE) { |
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277 |
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278 |
/* The string fits within the current log block */
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279 |
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280 |
len = str_len; |
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281 |
} else { |
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282 |
data_len = OS_FILE_LOG_BLOCK_SIZE - LOG_BLOCK_TRL_SIZE; |
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283 |
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284 |
len = OS_FILE_LOG_BLOCK_SIZE |
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285 |
- (log->buf_free % OS_FILE_LOG_BLOCK_SIZE) |
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286 |
- LOG_BLOCK_TRL_SIZE; |
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287 |
}
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288 |
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289 |
ut_memcpy(log->buf + log->buf_free, str, len); |
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290 |
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291 |
str_len -= len; |
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292 |
str = str + len; |
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293 |
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294 |
log_block = ut_align_down(log->buf + log->buf_free, |
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295 |
OS_FILE_LOG_BLOCK_SIZE); |
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296 |
log_block_set_data_len(log_block, data_len); |
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297 |
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298 |
if (data_len == OS_FILE_LOG_BLOCK_SIZE - LOG_BLOCK_TRL_SIZE) { |
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299 |
/* This block became full */
|
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300 |
log_block_set_data_len(log_block, OS_FILE_LOG_BLOCK_SIZE); |
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301 |
log_block_set_checkpoint_no(log_block, |
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302 |
log_sys->next_checkpoint_no); |
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303 |
len += LOG_BLOCK_HDR_SIZE + LOG_BLOCK_TRL_SIZE; |
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304 |
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305 |
log->lsn = ut_dulint_add(log->lsn, len); |
|
306 |
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307 |
/* Initialize the next block header */
|
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308 |
log_block_init(log_block + OS_FILE_LOG_BLOCK_SIZE, log->lsn); |
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309 |
} else { |
|
310 |
log->lsn = ut_dulint_add(log->lsn, len); |
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311 |
}
|
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312 |
||
313 |
log->buf_free += len; |
|
314 |
||
315 |
ut_ad(log->buf_free <= log->buf_size); |
|
316 |
||
317 |
if (str_len > 0) { |
|
318 |
goto part_loop; |
|
319 |
}
|
|
320 |
||
321 |
srv_log_write_requests++; |
|
322 |
}
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323 |
||
324 |
/****************************************************************
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325 |
Closes the log. */
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326 |
||
327 |
dulint
|
|
328 |
log_close(void) |
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329 |
/*===========*/
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330 |
/* out: lsn */
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331 |
{
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332 |
byte* log_block; |
|
333 |
ulint first_rec_group; |
|
334 |
dulint oldest_lsn; |
|
335 |
dulint lsn; |
|
336 |
log_t* log = log_sys; |
|
337 |
ulint checkpoint_age; |
|
338 |
||
339 |
ut_ad(mutex_own(&(log->mutex))); |
|
340 |
||
341 |
lsn = log->lsn; |
|
342 |
||
343 |
log_block = ut_align_down(log->buf + log->buf_free, |
|
344 |
OS_FILE_LOG_BLOCK_SIZE); |
|
345 |
first_rec_group = log_block_get_first_rec_group(log_block); |
|
346 |
||
347 |
if (first_rec_group == 0) { |
|
348 |
/* We initialized a new log block which was not written
|
|
349 |
full by the current mtr: the next mtr log record group
|
|
350 |
will start within this block at the offset data_len */
|
|
351 |
||
352 |
log_block_set_first_rec_group( |
|
353 |
log_block, log_block_get_data_len(log_block)); |
|
354 |
}
|
|
355 |
||
356 |
if (log->buf_free > log->max_buf_free) { |
|
357 |
||
358 |
log->check_flush_or_checkpoint = TRUE; |
|
359 |
}
|
|
360 |
||
361 |
checkpoint_age = ut_dulint_minus(lsn, log->last_checkpoint_lsn); |
|
362 |
||
363 |
if (checkpoint_age >= log->log_group_capacity) { |
|
364 |
/* TODO: split btr_store_big_rec_extern_fields() into small
|
|
365 |
steps so that we can release all latches in the middle, and
|
|
366 |
call log_free_check() to ensure we never write over log written
|
|
367 |
after the latest checkpoint. In principle, we should split all
|
|
368 |
big_rec operations, but other operations are smaller. */
|
|
369 |
||
370 |
if (!log_has_printed_chkp_warning |
|
371 |
|| difftime(time(NULL), log_last_warning_time) > 15) { |
|
372 |
||
373 |
log_has_printed_chkp_warning = TRUE; |
|
374 |
log_last_warning_time = time(NULL); |
|
375 |
||
376 |
ut_print_timestamp(stderr); |
|
377 |
fprintf(stderr, |
|
378 |
" InnoDB: ERROR: the age of the last"
|
|
379 |
" checkpoint is %lu,\n" |
|
380 |
"InnoDB: which exceeds the log group"
|
|
381 |
" capacity %lu.\n" |
|
382 |
"InnoDB: If you are using big"
|
|
383 |
" BLOB or TEXT rows, you must set the\n" |
|
384 |
"InnoDB: combined size of log files"
|
|
385 |
" at least 10 times bigger than the\n" |
|
386 |
"InnoDB: largest such row.\n", |
|
387 |
(ulong) checkpoint_age, |
|
388 |
(ulong) log->log_group_capacity); |
|
389 |
}
|
|
390 |
}
|
|
391 |
||
392 |
if (checkpoint_age <= log->max_modified_age_async) { |
|
393 |
||
394 |
goto function_exit; |
|
395 |
}
|
|
396 |
||
397 |
oldest_lsn = buf_pool_get_oldest_modification(); |
|
398 |
||
399 |
if (ut_dulint_is_zero(oldest_lsn) |
|
400 |
|| (ut_dulint_minus(lsn, oldest_lsn) |
|
401 |
> log->max_modified_age_async) |
|
402 |
|| checkpoint_age > log->max_checkpoint_age_async) { |
|
403 |
||
404 |
log->check_flush_or_checkpoint = TRUE; |
|
405 |
}
|
|
406 |
function_exit: |
|
407 |
||
408 |
#ifdef UNIV_LOG_DEBUG
|
|
409 |
log_check_log_recs(log->buf + log->old_buf_free, |
|
410 |
log->buf_free - log->old_buf_free, log->old_lsn); |
|
411 |
#endif
|
|
412 |
||
413 |
return(lsn); |
|
414 |
}
|
|
415 |
||
416 |
#ifdef UNIV_LOG_ARCHIVE
|
|
417 |
/**********************************************************
|
|
418 |
Pads the current log block full with dummy log records. Used in producing
|
|
419 |
consistent archived log files. */
|
|
420 |
static
|
|
421 |
void
|
|
422 |
log_pad_current_log_block(void) |
|
423 |
/*===========================*/
|
|
424 |
{
|
|
425 |
byte b = MLOG_DUMMY_RECORD; |
|
426 |
ulint pad_length; |
|
427 |
ulint i; |
|
428 |
dulint lsn; |
|
429 |
||
430 |
/* We retrieve lsn only because otherwise gcc crashed on HP-UX */
|
|
431 |
lsn = log_reserve_and_open(OS_FILE_LOG_BLOCK_SIZE); |
|
432 |
||
433 |
pad_length = OS_FILE_LOG_BLOCK_SIZE |
|
434 |
- (log_sys->buf_free % OS_FILE_LOG_BLOCK_SIZE) |
|
435 |
- LOG_BLOCK_TRL_SIZE; |
|
436 |
||
437 |
for (i = 0; i < pad_length; i++) { |
|
438 |
log_write_low(&b, 1); |
|
439 |
}
|
|
440 |
||
441 |
lsn = log_sys->lsn; |
|
442 |
||
443 |
log_close(); |
|
444 |
log_release(); |
|
445 |
||
446 |
ut_a((ut_dulint_get_low(lsn) % OS_FILE_LOG_BLOCK_SIZE) |
|
447 |
== LOG_BLOCK_HDR_SIZE); |
|
448 |
}
|
|
449 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
450 |
||
451 |
/**********************************************************
|
|
452 |
Calculates the data capacity of a log group, when the log file headers are not
|
|
453 |
included. */
|
|
454 |
||
455 |
ulint
|
|
456 |
log_group_get_capacity( |
|
457 |
/*===================*/
|
|
458 |
/* out: capacity in bytes */
|
|
459 |
log_group_t* group) /* in: log group */ |
|
460 |
{
|
|
461 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
462 |
||
463 |
return((group->file_size - LOG_FILE_HDR_SIZE) * group->n_files); |
|
464 |
}
|
|
465 |
||
466 |
/**********************************************************
|
|
467 |
Calculates the offset within a log group, when the log file headers are not
|
|
468 |
included. */
|
|
469 |
UNIV_INLINE
|
|
470 |
ulint
|
|
471 |
log_group_calc_size_offset( |
|
472 |
/*=======================*/
|
|
473 |
/* out: size offset (<= offset) */
|
|
474 |
ulint offset, /* in: real offset within the log group */ |
|
475 |
log_group_t* group) /* in: log group */ |
|
476 |
{
|
|
477 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
478 |
||
479 |
return(offset - LOG_FILE_HDR_SIZE * (1 + offset / group->file_size)); |
|
480 |
}
|
|
481 |
||
482 |
/**********************************************************
|
|
483 |
Calculates the offset within a log group, when the log file headers are
|
|
484 |
included. */
|
|
485 |
UNIV_INLINE
|
|
486 |
ulint
|
|
487 |
log_group_calc_real_offset( |
|
488 |
/*=======================*/
|
|
489 |
/* out: real offset (>= offset) */
|
|
490 |
ulint offset, /* in: size offset within the log group */ |
|
491 |
log_group_t* group) /* in: log group */ |
|
492 |
{
|
|
493 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
494 |
||
495 |
return(offset + LOG_FILE_HDR_SIZE |
|
496 |
* (1 + offset / (group->file_size - LOG_FILE_HDR_SIZE))); |
|
497 |
}
|
|
498 |
||
499 |
/**********************************************************
|
|
500 |
Calculates the offset of an lsn within a log group. */
|
|
501 |
static
|
|
502 |
ulint
|
|
503 |
log_group_calc_lsn_offset( |
|
504 |
/*======================*/
|
|
505 |
/* out: offset within the log group */
|
|
506 |
dulint lsn, /* in: lsn, must be within 4 GB of |
|
507 |
group->lsn */
|
|
508 |
log_group_t* group) /* in: log group */ |
|
509 |
{
|
|
510 |
dulint gr_lsn; |
|
511 |
ib_longlong gr_lsn_size_offset; |
|
512 |
ib_longlong difference; |
|
513 |
ib_longlong group_size; |
|
514 |
ib_longlong offset; |
|
515 |
||
516 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
517 |
||
518 |
/* If total log file size is > 2 GB we can easily get overflows
|
|
519 |
with 32-bit integers. Use 64-bit integers instead. */
|
|
520 |
||
521 |
gr_lsn = group->lsn; |
|
522 |
||
523 |
gr_lsn_size_offset = (ib_longlong) |
|
524 |
log_group_calc_size_offset(group->lsn_offset, group); |
|
525 |
||
526 |
group_size = (ib_longlong) log_group_get_capacity(group); |
|
527 |
||
528 |
if (ut_dulint_cmp(lsn, gr_lsn) >= 0) { |
|
529 |
||
530 |
difference = (ib_longlong) ut_dulint_minus(lsn, gr_lsn); |
|
531 |
} else { |
|
532 |
difference = (ib_longlong) ut_dulint_minus(gr_lsn, lsn); |
|
533 |
||
534 |
difference = difference % group_size; |
|
535 |
||
536 |
difference = group_size - difference; |
|
537 |
}
|
|
538 |
||
539 |
offset = (gr_lsn_size_offset + difference) % group_size; |
|
540 |
||
541 |
ut_a(offset < (((ib_longlong) 1) << 32)); /* offset must be < 4 GB */ |
|
542 |
||
543 |
/* fprintf(stderr,
|
|
544 |
"Offset is %lu gr_lsn_offset is %lu difference is %lu\n",
|
|
545 |
(ulint)offset,(ulint)gr_lsn_size_offset, (ulint)difference);
|
|
546 |
*/
|
|
547 |
||
548 |
return(log_group_calc_real_offset((ulint)offset, group)); |
|
549 |
}
|
|
550 |
||
551 |
/***********************************************************************
|
|
552 |
Calculates where in log files we find a specified lsn. */
|
|
553 |
||
554 |
ulint
|
|
555 |
log_calc_where_lsn_is( |
|
556 |
/*==================*/
|
|
557 |
/* out: log file number */
|
|
558 |
ib_longlong* log_file_offset, /* out: offset in that file |
|
559 |
(including the header) */
|
|
560 |
dulint first_header_lsn, /* in: first log file start |
|
561 |
lsn */
|
|
562 |
dulint lsn, /* in: lsn whose position to |
|
563 |
determine */
|
|
564 |
ulint n_log_files, /* in: total number of log |
|
565 |
files */
|
|
566 |
ib_longlong log_file_size) /* in: log file size |
|
567 |
(including the header) */
|
|
568 |
{
|
|
569 |
ib_longlong ib_lsn; |
|
570 |
ib_longlong ib_first_header_lsn; |
|
571 |
ib_longlong capacity = log_file_size - LOG_FILE_HDR_SIZE; |
|
572 |
ulint file_no; |
|
573 |
ib_longlong add_this_many; |
|
574 |
||
575 |
ib_lsn = ut_conv_dulint_to_longlong(lsn); |
|
576 |
ib_first_header_lsn = ut_conv_dulint_to_longlong(first_header_lsn); |
|
577 |
||
578 |
if (ib_lsn < ib_first_header_lsn) { |
|
579 |
add_this_many = 1 + (ib_first_header_lsn - ib_lsn) |
|
580 |
/ (capacity * (ib_longlong)n_log_files); |
|
581 |
ib_lsn += add_this_many |
|
582 |
* capacity * (ib_longlong)n_log_files; |
|
583 |
}
|
|
584 |
||
585 |
ut_a(ib_lsn >= ib_first_header_lsn); |
|
586 |
||
587 |
file_no = ((ulint)((ib_lsn - ib_first_header_lsn) / capacity)) |
|
588 |
% n_log_files; |
|
589 |
*log_file_offset = (ib_lsn - ib_first_header_lsn) % capacity; |
|
590 |
||
591 |
*log_file_offset = *log_file_offset + LOG_FILE_HDR_SIZE; |
|
592 |
||
593 |
return(file_no); |
|
594 |
}
|
|
595 |
||
596 |
/************************************************************
|
|
597 |
Sets the field values in group to correspond to a given lsn. For this function
|
|
598 |
to work, the values must already be correctly initialized to correspond to
|
|
599 |
some lsn, for instance, a checkpoint lsn. */
|
|
600 |
||
601 |
void
|
|
602 |
log_group_set_fields( |
|
603 |
/*=================*/
|
|
604 |
log_group_t* group, /* in: group */ |
|
605 |
dulint lsn) /* in: lsn for which the values should be |
|
606 |
set */
|
|
607 |
{
|
|
608 |
group->lsn_offset = log_group_calc_lsn_offset(lsn, group); |
|
609 |
group->lsn = lsn; |
|
610 |
}
|
|
611 |
||
612 |
/*********************************************************************
|
|
613 |
Calculates the recommended highest values for lsn - last_checkpoint_lsn,
|
|
614 |
lsn - buf_get_oldest_modification(), and lsn - max_archive_lsn_age. */
|
|
615 |
static
|
|
616 |
ibool
|
|
617 |
log_calc_max_ages(void) |
|
618 |
/*===================*/
|
|
619 |
/* out: error value FALSE if the smallest log group is
|
|
620 |
too small to accommodate the number of OS threads in
|
|
621 |
the database server */
|
|
622 |
{
|
|
623 |
log_group_t* group; |
|
624 |
ulint margin; |
|
625 |
ulint free; |
|
626 |
ibool success = TRUE; |
|
627 |
ulint smallest_capacity; |
|
628 |
ulint archive_margin; |
|
629 |
ulint smallest_archive_margin; |
|
630 |
||
631 |
ut_ad(!mutex_own(&(log_sys->mutex))); |
|
632 |
||
633 |
mutex_enter(&(log_sys->mutex)); |
|
634 |
||
635 |
group = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
636 |
||
637 |
ut_ad(group); |
|
638 |
||
639 |
smallest_capacity = ULINT_MAX; |
|
640 |
smallest_archive_margin = ULINT_MAX; |
|
641 |
||
642 |
while (group) { |
|
643 |
if (log_group_get_capacity(group) < smallest_capacity) { |
|
644 |
||
645 |
smallest_capacity = log_group_get_capacity(group); |
|
646 |
}
|
|
647 |
||
648 |
archive_margin = log_group_get_capacity(group) |
|
649 |
- (group->file_size - LOG_FILE_HDR_SIZE) |
|
650 |
- LOG_ARCHIVE_EXTRA_MARGIN; |
|
651 |
||
652 |
if (archive_margin < smallest_archive_margin) { |
|
653 |
||
654 |
smallest_archive_margin = archive_margin; |
|
655 |
}
|
|
656 |
||
657 |
group = UT_LIST_GET_NEXT(log_groups, group); |
|
658 |
}
|
|
659 |
||
660 |
/* Add extra safety */
|
|
661 |
smallest_capacity = smallest_capacity - smallest_capacity / 10; |
|
662 |
||
663 |
/* For each OS thread we must reserve so much free space in the
|
|
664 |
smallest log group that it can accommodate the log entries produced
|
|
665 |
by single query steps: running out of free log space is a serious
|
|
666 |
system error which requires rebooting the database. */
|
|
667 |
||
668 |
free = LOG_CHECKPOINT_FREE_PER_THREAD * (10 + srv_thread_concurrency) |
|
669 |
+ LOG_CHECKPOINT_EXTRA_FREE; |
|
670 |
if (free >= smallest_capacity / 2) { |
|
671 |
success = FALSE; |
|
672 |
||
673 |
goto failure; |
|
674 |
} else { |
|
675 |
margin = smallest_capacity - free; |
|
676 |
}
|
|
677 |
||
678 |
margin = ut_min(margin, log_sys->adm_checkpoint_interval); |
|
679 |
||
680 |
margin = margin - margin / 10; /* Add still some extra safety */ |
|
681 |
||
682 |
log_sys->log_group_capacity = smallest_capacity; |
|
683 |
||
684 |
log_sys->max_modified_age_async = margin |
|
685 |
- margin / LOG_POOL_PREFLUSH_RATIO_ASYNC; |
|
686 |
log_sys->max_modified_age_sync = margin |
|
687 |
- margin / LOG_POOL_PREFLUSH_RATIO_SYNC; |
|
688 |
||
689 |
log_sys->max_checkpoint_age_async = margin - margin |
|
690 |
/ LOG_POOL_CHECKPOINT_RATIO_ASYNC; |
|
691 |
log_sys->max_checkpoint_age = margin; |
|
692 |
||
693 |
#ifdef UNIV_LOG_ARCHIVE
|
|
694 |
log_sys->max_archived_lsn_age = smallest_archive_margin; |
|
695 |
||
696 |
log_sys->max_archived_lsn_age_async = smallest_archive_margin |
|
697 |
- smallest_archive_margin / LOG_ARCHIVE_RATIO_ASYNC; |
|
698 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
699 |
failure: |
|
700 |
mutex_exit(&(log_sys->mutex)); |
|
701 |
||
702 |
if (!success) { |
|
703 |
fprintf(stderr, |
|
704 |
"InnoDB: Error: ib_logfiles are too small"
|
|
705 |
" for innodb_thread_concurrency %lu.\n" |
|
706 |
"InnoDB: The combined size of ib_logfiles"
|
|
707 |
" should be bigger than\n" |
|
708 |
"InnoDB: 200 kB * innodb_thread_concurrency.\n" |
|
709 |
"InnoDB: To get mysqld to start up, set"
|
|
710 |
" innodb_thread_concurrency in my.cnf\n" |
|
711 |
"InnoDB: to a lower value, for example, to 8."
|
|
712 |
" After an ERROR-FREE shutdown\n" |
|
713 |
"InnoDB: of mysqld you can adjust the size of"
|
|
714 |
" ib_logfiles, as explained in\n" |
|
715 |
"InnoDB: http://dev.mysql.com/doc/refman/5.1/en/"
|
|
716 |
"adding-and-removing.html\n" |
|
717 |
"InnoDB: Cannot continue operation."
|
|
718 |
" Calling exit(1).\n", |
|
719 |
(ulong)srv_thread_concurrency); |
|
720 |
||
721 |
exit(1); |
|
722 |
}
|
|
723 |
||
724 |
return(success); |
|
725 |
}
|
|
726 |
||
727 |
/**********************************************************
|
|
728 |
Initializes the log. */
|
|
729 |
||
730 |
void
|
|
731 |
log_init(void) |
|
732 |
/*==========*/
|
|
733 |
{
|
|
734 |
byte* buf; |
|
735 |
||
736 |
log_sys = mem_alloc(sizeof(log_t)); |
|
737 |
||
738 |
mutex_create(&log_sys->mutex, SYNC_LOG); |
|
739 |
||
740 |
mutex_enter(&(log_sys->mutex)); |
|
741 |
||
742 |
/* Start the lsn from one log block from zero: this way every
|
|
743 |
log record has a start lsn != zero, a fact which we will use */
|
|
744 |
||
745 |
log_sys->lsn = LOG_START_LSN; |
|
746 |
||
747 |
ut_a(LOG_BUFFER_SIZE >= 16 * OS_FILE_LOG_BLOCK_SIZE); |
|
748 |
ut_a(LOG_BUFFER_SIZE >= 4 * UNIV_PAGE_SIZE); |
|
749 |
||
750 |
buf = ut_malloc(LOG_BUFFER_SIZE + OS_FILE_LOG_BLOCK_SIZE); |
|
751 |
log_sys->buf = ut_align(buf, OS_FILE_LOG_BLOCK_SIZE); |
|
752 |
||
753 |
log_sys->buf_size = LOG_BUFFER_SIZE; |
|
754 |
||
755 |
memset(log_sys->buf, '\0', LOG_BUFFER_SIZE); |
|
756 |
||
757 |
log_sys->max_buf_free = log_sys->buf_size / LOG_BUF_FLUSH_RATIO |
|
758 |
- LOG_BUF_FLUSH_MARGIN; |
|
759 |
log_sys->check_flush_or_checkpoint = TRUE; |
|
760 |
UT_LIST_INIT(log_sys->log_groups); |
|
761 |
||
762 |
log_sys->n_log_ios = 0; |
|
763 |
||
764 |
log_sys->n_log_ios_old = log_sys->n_log_ios; |
|
765 |
log_sys->last_printout_time = time(NULL); |
|
766 |
/*----------------------------*/
|
|
767 |
||
768 |
log_sys->buf_next_to_write = 0; |
|
769 |
||
770 |
log_sys->write_lsn = ut_dulint_zero; |
|
771 |
log_sys->current_flush_lsn = ut_dulint_zero; |
|
772 |
log_sys->flushed_to_disk_lsn = ut_dulint_zero; |
|
773 |
||
774 |
log_sys->written_to_some_lsn = log_sys->lsn; |
|
775 |
log_sys->written_to_all_lsn = log_sys->lsn; |
|
776 |
||
777 |
log_sys->n_pending_writes = 0; |
|
778 |
||
779 |
log_sys->no_flush_event = os_event_create(NULL); |
|
780 |
||
781 |
os_event_set(log_sys->no_flush_event); |
|
782 |
||
783 |
log_sys->one_flushed_event = os_event_create(NULL); |
|
784 |
||
785 |
os_event_set(log_sys->one_flushed_event); |
|
786 |
||
787 |
/*----------------------------*/
|
|
788 |
log_sys->adm_checkpoint_interval = ULINT_MAX; |
|
789 |
||
790 |
log_sys->next_checkpoint_no = ut_dulint_zero; |
|
791 |
log_sys->last_checkpoint_lsn = log_sys->lsn; |
|
792 |
log_sys->n_pending_checkpoint_writes = 0; |
|
793 |
||
794 |
rw_lock_create(&log_sys->checkpoint_lock, SYNC_NO_ORDER_CHECK); |
|
795 |
||
796 |
log_sys->checkpoint_buf |
|
797 |
= ut_align(mem_alloc(2 * OS_FILE_LOG_BLOCK_SIZE), |
|
798 |
OS_FILE_LOG_BLOCK_SIZE); |
|
799 |
memset(log_sys->checkpoint_buf, '\0', OS_FILE_LOG_BLOCK_SIZE); |
|
800 |
/*----------------------------*/
|
|
801 |
||
802 |
#ifdef UNIV_LOG_ARCHIVE
|
|
803 |
/* Under MySQL, log archiving is always off */
|
|
804 |
log_sys->archiving_state = LOG_ARCH_OFF; |
|
805 |
log_sys->archived_lsn = log_sys->lsn; |
|
806 |
log_sys->next_archived_lsn = ut_dulint_zero; |
|
807 |
||
808 |
log_sys->n_pending_archive_ios = 0; |
|
809 |
||
810 |
rw_lock_create(&log_sys->archive_lock, SYNC_NO_ORDER_CHECK); |
|
811 |
||
812 |
log_sys->archive_buf = NULL; |
|
813 |
||
814 |
/* ut_align(
|
|
815 |
ut_malloc(LOG_ARCHIVE_BUF_SIZE
|
|
816 |
+ OS_FILE_LOG_BLOCK_SIZE),
|
|
817 |
OS_FILE_LOG_BLOCK_SIZE); */
|
|
818 |
log_sys->archive_buf_size = 0; |
|
819 |
||
820 |
/* memset(log_sys->archive_buf, '\0', LOG_ARCHIVE_BUF_SIZE); */
|
|
821 |
||
822 |
log_sys->archiving_on = os_event_create(NULL); |
|
823 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
824 |
||
825 |
/*----------------------------*/
|
|
826 |
||
827 |
log_block_init(log_sys->buf, log_sys->lsn); |
|
828 |
log_block_set_first_rec_group(log_sys->buf, LOG_BLOCK_HDR_SIZE); |
|
829 |
||
830 |
log_sys->buf_free = LOG_BLOCK_HDR_SIZE; |
|
831 |
log_sys->lsn = ut_dulint_add(LOG_START_LSN, LOG_BLOCK_HDR_SIZE); |
|
832 |
||
833 |
mutex_exit(&(log_sys->mutex)); |
|
834 |
||
835 |
#ifdef UNIV_LOG_DEBUG
|
|
836 |
recv_sys_create(); |
|
837 |
recv_sys_init(FALSE, buf_pool_get_curr_size()); |
|
838 |
||
839 |
recv_sys->parse_start_lsn = log_sys->lsn; |
|
840 |
recv_sys->scanned_lsn = log_sys->lsn; |
|
841 |
recv_sys->scanned_checkpoint_no = 0; |
|
842 |
recv_sys->recovered_lsn = log_sys->lsn; |
|
843 |
recv_sys->limit_lsn = ut_dulint_max; |
|
844 |
#endif
|
|
845 |
}
|
|
846 |
||
847 |
/**********************************************************************
|
|
848 |
Inits a log group to the log system. */
|
|
849 |
||
850 |
void
|
|
851 |
log_group_init( |
|
852 |
/*===========*/
|
|
853 |
ulint id, /* in: group id */ |
|
854 |
ulint n_files, /* in: number of log files */ |
|
855 |
ulint file_size, /* in: log file size in bytes */ |
|
856 |
ulint space_id, /* in: space id of the file space |
|
857 |
which contains the log files of this
|
|
858 |
group */
|
|
859 |
ulint archive_space_id __attribute__((unused))) |
|
860 |
/* in: space id of the file space
|
|
861 |
which contains some archived log
|
|
862 |
files for this group; currently, only
|
|
863 |
for the first log group this is
|
|
864 |
used */
|
|
865 |
{
|
|
866 |
ulint i; |
|
867 |
||
868 |
log_group_t* group; |
|
869 |
||
870 |
group = mem_alloc(sizeof(log_group_t)); |
|
871 |
||
872 |
group->id = id; |
|
873 |
group->n_files = n_files; |
|
874 |
group->file_size = file_size; |
|
875 |
group->space_id = space_id; |
|
876 |
group->state = LOG_GROUP_OK; |
|
877 |
group->lsn = LOG_START_LSN; |
|
878 |
group->lsn_offset = LOG_FILE_HDR_SIZE; |
|
879 |
group->n_pending_writes = 0; |
|
880 |
||
881 |
group->file_header_bufs = mem_alloc(sizeof(byte*) * n_files); |
|
882 |
#ifdef UNIV_LOG_ARCHIVE
|
|
883 |
group->archive_file_header_bufs = mem_alloc(sizeof(byte*) * n_files); |
|
884 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
885 |
||
886 |
for (i = 0; i < n_files; i++) { |
|
887 |
*(group->file_header_bufs + i) = ut_align( |
|
888 |
mem_alloc(LOG_FILE_HDR_SIZE + OS_FILE_LOG_BLOCK_SIZE), |
|
889 |
OS_FILE_LOG_BLOCK_SIZE); |
|
890 |
||
891 |
memset(*(group->file_header_bufs + i), '\0', |
|
892 |
LOG_FILE_HDR_SIZE); |
|
893 |
||
894 |
#ifdef UNIV_LOG_ARCHIVE
|
|
895 |
*(group->archive_file_header_bufs + i) = ut_align( |
|
896 |
mem_alloc(LOG_FILE_HDR_SIZE + OS_FILE_LOG_BLOCK_SIZE), |
|
897 |
OS_FILE_LOG_BLOCK_SIZE); |
|
898 |
memset(*(group->archive_file_header_bufs + i), '\0', |
|
899 |
LOG_FILE_HDR_SIZE); |
|
900 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
901 |
}
|
|
902 |
||
903 |
#ifdef UNIV_LOG_ARCHIVE
|
|
904 |
group->archive_space_id = archive_space_id; |
|
905 |
||
906 |
group->archived_file_no = 0; |
|
907 |
group->archived_offset = 0; |
|
908 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
909 |
||
910 |
group->checkpoint_buf = ut_align( |
|
911 |
mem_alloc(2 * OS_FILE_LOG_BLOCK_SIZE), OS_FILE_LOG_BLOCK_SIZE); |
|
912 |
||
913 |
memset(group->checkpoint_buf, '\0', OS_FILE_LOG_BLOCK_SIZE); |
|
914 |
||
915 |
UT_LIST_ADD_LAST(log_groups, log_sys->log_groups, group); |
|
916 |
||
917 |
ut_a(log_calc_max_ages()); |
|
918 |
}
|
|
919 |
||
920 |
/**********************************************************************
|
|
921 |
Does the unlockings needed in flush i/o completion. */
|
|
922 |
UNIV_INLINE
|
|
923 |
void
|
|
924 |
log_flush_do_unlocks( |
|
925 |
/*=================*/
|
|
926 |
ulint code) /* in: any ORed combination of LOG_UNLOCK_FLUSH_LOCK |
|
927 |
and LOG_UNLOCK_NONE_FLUSHED_LOCK */
|
|
928 |
{
|
|
929 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
930 |
||
931 |
/* NOTE that we must own the log mutex when doing the setting of the
|
|
932 |
events: this is because transactions will wait for these events to
|
|
933 |
be set, and at that moment the log flush they were waiting for must
|
|
934 |
have ended. If the log mutex were not reserved here, the i/o-thread
|
|
935 |
calling this function might be preempted for a while, and when it
|
|
936 |
resumed execution, it might be that a new flush had been started, and
|
|
937 |
this function would erroneously signal the NEW flush as completed.
|
|
938 |
Thus, the changes in the state of these events are performed
|
|
939 |
atomically in conjunction with the changes in the state of
|
|
940 |
log_sys->n_pending_writes etc. */
|
|
941 |
||
942 |
if (code & LOG_UNLOCK_NONE_FLUSHED_LOCK) { |
|
943 |
os_event_set(log_sys->one_flushed_event); |
|
944 |
}
|
|
945 |
||
946 |
if (code & LOG_UNLOCK_FLUSH_LOCK) { |
|
947 |
os_event_set(log_sys->no_flush_event); |
|
948 |
}
|
|
949 |
}
|
|
950 |
||
951 |
/**********************************************************************
|
|
952 |
Checks if a flush is completed for a log group and does the completion
|
|
953 |
routine if yes. */
|
|
954 |
UNIV_INLINE
|
|
955 |
ulint
|
|
956 |
log_group_check_flush_completion( |
|
957 |
/*=============================*/
|
|
958 |
/* out: LOG_UNLOCK_NONE_FLUSHED_LOCK or 0 */
|
|
959 |
log_group_t* group) /* in: log group */ |
|
960 |
{
|
|
961 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
962 |
||
963 |
if (!log_sys->one_flushed && group->n_pending_writes == 0) { |
|
964 |
#ifdef UNIV_DEBUG
|
|
965 |
if (log_debug_writes) { |
|
966 |
fprintf(stderr, |
|
967 |
"Log flushed first to group %lu\n", |
|
968 |
(ulong) group->id); |
|
969 |
}
|
|
970 |
#endif /* UNIV_DEBUG */ |
|
971 |
log_sys->written_to_some_lsn = log_sys->write_lsn; |
|
972 |
log_sys->one_flushed = TRUE; |
|
973 |
||
974 |
return(LOG_UNLOCK_NONE_FLUSHED_LOCK); |
|
975 |
}
|
|
976 |
||
977 |
#ifdef UNIV_DEBUG
|
|
978 |
if (log_debug_writes && (group->n_pending_writes == 0)) { |
|
979 |
||
980 |
fprintf(stderr, "Log flushed to group %lu\n", |
|
981 |
(ulong) group->id); |
|
982 |
}
|
|
983 |
#endif /* UNIV_DEBUG */ |
|
984 |
return(0); |
|
985 |
}
|
|
986 |
||
987 |
/**********************************************************
|
|
988 |
Checks if a flush is completed and does the completion routine if yes. */
|
|
989 |
static
|
|
990 |
ulint
|
|
991 |
log_sys_check_flush_completion(void) |
|
992 |
/*================================*/
|
|
993 |
/* out: LOG_UNLOCK_FLUSH_LOCK or 0 */
|
|
994 |
{
|
|
995 |
ulint move_start; |
|
996 |
ulint move_end; |
|
997 |
||
998 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
999 |
||
1000 |
if (log_sys->n_pending_writes == 0) { |
|
1001 |
||
1002 |
log_sys->written_to_all_lsn = log_sys->write_lsn; |
|
1003 |
log_sys->buf_next_to_write = log_sys->write_end_offset; |
|
1004 |
||
1005 |
if (log_sys->write_end_offset > log_sys->max_buf_free / 2) { |
|
1006 |
/* Move the log buffer content to the start of the
|
|
1007 |
buffer */
|
|
1008 |
||
1009 |
move_start = ut_calc_align_down( |
|
1010 |
log_sys->write_end_offset, |
|
1011 |
OS_FILE_LOG_BLOCK_SIZE); |
|
1012 |
move_end = ut_calc_align(log_sys->buf_free, |
|
1013 |
OS_FILE_LOG_BLOCK_SIZE); |
|
1014 |
||
1015 |
ut_memmove(log_sys->buf, log_sys->buf + move_start, |
|
1016 |
move_end - move_start); |
|
1017 |
log_sys->buf_free -= move_start; |
|
1018 |
||
1019 |
log_sys->buf_next_to_write -= move_start; |
|
1020 |
}
|
|
1021 |
||
1022 |
return(LOG_UNLOCK_FLUSH_LOCK); |
|
1023 |
}
|
|
1024 |
||
1025 |
return(0); |
|
1026 |
}
|
|
1027 |
||
1028 |
/**********************************************************
|
|
1029 |
Completes an i/o to a log file. */
|
|
1030 |
||
1031 |
void
|
|
1032 |
log_io_complete( |
|
1033 |
/*============*/
|
|
1034 |
log_group_t* group) /* in: log group or a dummy pointer */ |
|
1035 |
{
|
|
1036 |
ulint unlock; |
|
1037 |
||
1038 |
#ifdef UNIV_LOG_ARCHIVE
|
|
1039 |
if ((byte*)group == &log_archive_io) { |
|
1040 |
/* It was an archive write */
|
|
1041 |
||
1042 |
log_io_complete_archive(); |
|
1043 |
||
1044 |
return; |
|
1045 |
}
|
|
1046 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
1047 |
||
1048 |
if ((ulint)group & 0x1UL) { |
|
1049 |
/* It was a checkpoint write */
|
|
1050 |
group = (log_group_t*)((ulint)group - 1); |
|
1051 |
||
1052 |
if (srv_unix_file_flush_method != SRV_UNIX_O_DSYNC |
|
1053 |
&& srv_unix_file_flush_method != SRV_UNIX_NOSYNC) { |
|
1054 |
||
1055 |
fil_flush(group->space_id); |
|
1056 |
}
|
|
1057 |
||
1058 |
#ifdef UNIV_DEBUG
|
|
1059 |
if (log_debug_writes) { |
|
1060 |
fprintf(stderr, |
|
1061 |
"Checkpoint info written to group %lu\n", |
|
1062 |
group->id); |
|
1063 |
}
|
|
1064 |
#endif /* UNIV_DEBUG */ |
|
1065 |
log_io_complete_checkpoint(); |
|
1066 |
||
1067 |
return; |
|
1068 |
}
|
|
1069 |
||
1070 |
ut_error; /* We currently use synchronous writing of the |
|
1071 |
logs and cannot end up here! */
|
|
1072 |
||
1073 |
if (srv_unix_file_flush_method != SRV_UNIX_O_DSYNC |
|
1074 |
&& srv_unix_file_flush_method != SRV_UNIX_NOSYNC |
|
1075 |
&& srv_flush_log_at_trx_commit != 2) { |
|
1076 |
||
1077 |
fil_flush(group->space_id); |
|
1078 |
}
|
|
1079 |
||
1080 |
mutex_enter(&(log_sys->mutex)); |
|
1081 |
||
1082 |
ut_a(group->n_pending_writes > 0); |
|
1083 |
ut_a(log_sys->n_pending_writes > 0); |
|
1084 |
||
1085 |
group->n_pending_writes--; |
|
1086 |
log_sys->n_pending_writes--; |
|
1087 |
||
1088 |
unlock = log_group_check_flush_completion(group); |
|
1089 |
unlock = unlock | log_sys_check_flush_completion(); |
|
1090 |
||
1091 |
log_flush_do_unlocks(unlock); |
|
1092 |
||
1093 |
mutex_exit(&(log_sys->mutex)); |
|
1094 |
}
|
|
1095 |
||
1096 |
/**********************************************************
|
|
1097 |
Writes a log file header to a log file space. */
|
|
1098 |
static
|
|
1099 |
void
|
|
1100 |
log_group_file_header_flush( |
|
1101 |
/*========================*/
|
|
1102 |
log_group_t* group, /* in: log group */ |
|
1103 |
ulint nth_file, /* in: header to the nth file in the |
|
1104 |
log file space */
|
|
1105 |
dulint start_lsn) /* in: log file data starts at this |
|
1106 |
lsn */
|
|
1107 |
{
|
|
1108 |
byte* buf; |
|
1109 |
ulint dest_offset; |
|
1110 |
||
1111 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
1112 |
ut_a(nth_file < group->n_files); |
|
1113 |
||
1114 |
buf = *(group->file_header_bufs + nth_file); |
|
1115 |
||
1116 |
mach_write_to_4(buf + LOG_GROUP_ID, group->id); |
|
1117 |
mach_write_to_8(buf + LOG_FILE_START_LSN, start_lsn); |
|
1118 |
||
1119 |
/* Wipe over possible label of ibbackup --restore */
|
|
1120 |
memcpy(buf + LOG_FILE_WAS_CREATED_BY_HOT_BACKUP, " ", 4); |
|
1121 |
||
1122 |
dest_offset = nth_file * group->file_size; |
|
1123 |
||
1124 |
#ifdef UNIV_DEBUG
|
|
1125 |
if (log_debug_writes) { |
|
1126 |
fprintf(stderr, |
|
1127 |
"Writing log file header to group %lu file %lu\n", |
|
1128 |
(ulong) group->id, (ulong) nth_file); |
|
1129 |
}
|
|
1130 |
#endif /* UNIV_DEBUG */ |
|
1131 |
if (log_do_write) { |
|
1132 |
log_sys->n_log_ios++; |
|
1133 |
||
1134 |
srv_os_log_pending_writes++; |
|
1135 |
||
1136 |
fil_io(OS_FILE_WRITE | OS_FILE_LOG, TRUE, group->space_id, |
|
1137 |
dest_offset / UNIV_PAGE_SIZE, |
|
1138 |
dest_offset % UNIV_PAGE_SIZE, |
|
1139 |
OS_FILE_LOG_BLOCK_SIZE, |
|
1140 |
buf, group); |
|
1141 |
||
1142 |
srv_os_log_pending_writes--; |
|
1143 |
}
|
|
1144 |
}
|
|
1145 |
||
1146 |
/**********************************************************
|
|
1147 |
Stores a 4-byte checksum to the trailer checksum field of a log block
|
|
1148 |
before writing it to a log file. This checksum is used in recovery to
|
|
1149 |
check the consistency of a log block. */
|
|
1150 |
static
|
|
1151 |
void
|
|
1152 |
log_block_store_checksum( |
|
1153 |
/*=====================*/
|
|
1154 |
byte* block) /* in/out: pointer to a log block */ |
|
1155 |
{
|
|
1156 |
log_block_set_checksum(block, log_block_calc_checksum(block)); |
|
1157 |
}
|
|
1158 |
||
1159 |
/**********************************************************
|
|
1160 |
Writes a buffer to a log file group. */
|
|
1161 |
||
1162 |
void
|
|
1163 |
log_group_write_buf( |
|
1164 |
/*================*/
|
|
1165 |
log_group_t* group, /* in: log group */ |
|
1166 |
byte* buf, /* in: buffer */ |
|
1167 |
ulint len, /* in: buffer len; must be divisible |
|
1168 |
by OS_FILE_LOG_BLOCK_SIZE */
|
|
1169 |
dulint start_lsn, /* in: start lsn of the buffer; must |
|
1170 |
be divisible by
|
|
1171 |
OS_FILE_LOG_BLOCK_SIZE */
|
|
1172 |
ulint new_data_offset)/* in: start offset of new data in |
|
1173 |
buf: this parameter is used to decide
|
|
1174 |
if we have to write a new log file
|
|
1175 |
header */
|
|
1176 |
{
|
|
1177 |
ulint write_len; |
|
1178 |
ibool write_header; |
|
1179 |
ulint next_offset; |
|
1180 |
ulint i; |
|
1181 |
||
1182 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
1183 |
ut_a(len % OS_FILE_LOG_BLOCK_SIZE == 0); |
|
1184 |
ut_a(ut_dulint_get_low(start_lsn) % OS_FILE_LOG_BLOCK_SIZE == 0); |
|
1185 |
||
1186 |
if (new_data_offset == 0) { |
|
1187 |
write_header = TRUE; |
|
1188 |
} else { |
|
1189 |
write_header = FALSE; |
|
1190 |
}
|
|
1191 |
loop: |
|
1192 |
if (len == 0) { |
|
1193 |
||
1194 |
return; |
|
1195 |
}
|
|
1196 |
||
1197 |
next_offset = log_group_calc_lsn_offset(start_lsn, group); |
|
1198 |
||
1199 |
if ((next_offset % group->file_size == LOG_FILE_HDR_SIZE) |
|
1200 |
&& write_header) { |
|
1201 |
/* We start to write a new log file instance in the group */
|
|
1202 |
||
1203 |
log_group_file_header_flush(group, |
|
1204 |
next_offset / group->file_size, |
|
1205 |
start_lsn); |
|
1206 |
srv_os_log_written+= OS_FILE_LOG_BLOCK_SIZE; |
|
1207 |
srv_log_writes++; |
|
1208 |
}
|
|
1209 |
||
1210 |
if ((next_offset % group->file_size) + len > group->file_size) { |
|
1211 |
||
1212 |
write_len = group->file_size |
|
1213 |
- (next_offset % group->file_size); |
|
1214 |
} else { |
|
1215 |
write_len = len; |
|
1216 |
}
|
|
1217 |
||
1218 |
#ifdef UNIV_DEBUG
|
|
1219 |
if (log_debug_writes) { |
|
1220 |
||
1221 |
fprintf(stderr, |
|
1222 |
"Writing log file segment to group %lu"
|
|
1223 |
" offset %lu len %lu\n" |
|
1224 |
"start lsn %lu %lu\n" |
|
1225 |
"First block n:o %lu last block n:o %lu\n", |
|
1226 |
(ulong) group->id, (ulong) next_offset, |
|
1227 |
(ulong) write_len, |
|
1228 |
(ulong) ut_dulint_get_high(start_lsn), |
|
1229 |
(ulong) ut_dulint_get_low(start_lsn), |
|
1230 |
(ulong) log_block_get_hdr_no(buf), |
|
1231 |
(ulong) log_block_get_hdr_no( |
|
1232 |
buf + write_len - OS_FILE_LOG_BLOCK_SIZE)); |
|
1233 |
ut_a(log_block_get_hdr_no(buf) |
|
1234 |
== log_block_convert_lsn_to_no(start_lsn)); |
|
1235 |
||
1236 |
for (i = 0; i < write_len / OS_FILE_LOG_BLOCK_SIZE; i++) { |
|
1237 |
||
1238 |
ut_a(log_block_get_hdr_no(buf) + i |
|
1239 |
== log_block_get_hdr_no( |
|
1240 |
buf + i * OS_FILE_LOG_BLOCK_SIZE)); |
|
1241 |
}
|
|
1242 |
}
|
|
1243 |
#endif /* UNIV_DEBUG */ |
|
1244 |
/* Calculate the checksums for each log block and write them to
|
|
1245 |
the trailer fields of the log blocks */
|
|
1246 |
||
1247 |
for (i = 0; i < write_len / OS_FILE_LOG_BLOCK_SIZE; i++) { |
|
1248 |
log_block_store_checksum(buf + i * OS_FILE_LOG_BLOCK_SIZE); |
|
1249 |
}
|
|
1250 |
||
1251 |
if (log_do_write) { |
|
1252 |
log_sys->n_log_ios++; |
|
1253 |
||
1254 |
srv_os_log_pending_writes++; |
|
1255 |
||
1256 |
fil_io(OS_FILE_WRITE | OS_FILE_LOG, TRUE, group->space_id, |
|
1257 |
next_offset / UNIV_PAGE_SIZE, |
|
1258 |
next_offset % UNIV_PAGE_SIZE, write_len, buf, group); |
|
1259 |
||
1260 |
srv_os_log_pending_writes--; |
|
1261 |
||
1262 |
srv_os_log_written+= write_len; |
|
1263 |
srv_log_writes++; |
|
1264 |
}
|
|
1265 |
||
1266 |
if (write_len < len) { |
|
1267 |
start_lsn = ut_dulint_add(start_lsn, write_len); |
|
1268 |
len -= write_len; |
|
1269 |
buf += write_len; |
|
1270 |
||
1271 |
write_header = TRUE; |
|
1272 |
||
1273 |
goto loop; |
|
1274 |
}
|
|
1275 |
}
|
|
1276 |
||
1277 |
/**********************************************************
|
|
1278 |
This function is called, e.g., when a transaction wants to commit. It checks
|
|
1279 |
that the log has been written to the log file up to the last log entry written
|
|
1280 |
by the transaction. If there is a flush running, it waits and checks if the
|
|
1281 |
flush flushed enough. If not, starts a new flush. */
|
|
1282 |
||
1283 |
void
|
|
1284 |
log_write_up_to( |
|
1285 |
/*============*/
|
|
1286 |
dulint lsn, /* in: log sequence number up to which the log should |
|
1287 |
be written, ut_dulint_max if not specified */
|
|
1288 |
ulint wait, /* in: LOG_NO_WAIT, LOG_WAIT_ONE_GROUP, |
|
1289 |
or LOG_WAIT_ALL_GROUPS */
|
|
1290 |
ibool flush_to_disk) |
|
1291 |
/* in: TRUE if we want the written log also to be
|
|
1292 |
flushed to disk */
|
|
1293 |
{
|
|
1294 |
log_group_t* group; |
|
1295 |
ulint start_offset; |
|
1296 |
ulint end_offset; |
|
1297 |
ulint area_start; |
|
1298 |
ulint area_end; |
|
1299 |
#ifdef UNIV_DEBUG
|
|
1300 |
ulint loop_count = 0; |
|
1301 |
#endif /* UNIV_DEBUG */ |
|
1302 |
ulint unlock; |
|
1303 |
||
1304 |
if (recv_no_ibuf_operations) { |
|
1305 |
/* Recovery is running and no operations on the log files are
|
|
1306 |
allowed yet (the variable name .._no_ibuf_.. is misleading) */
|
|
1307 |
||
1308 |
return; |
|
1309 |
}
|
|
1310 |
||
1311 |
loop: |
|
1312 |
#ifdef UNIV_DEBUG
|
|
1313 |
loop_count++; |
|
1314 |
||
1315 |
ut_ad(loop_count < 5); |
|
1316 |
||
1317 |
# if 0
|
|
1318 |
if (loop_count > 2) { |
|
1319 |
fprintf(stderr, "Log loop count %lu\n", loop_count); |
|
1320 |
}
|
|
1321 |
# endif
|
|
1322 |
#endif
|
|
1323 |
||
1324 |
mutex_enter(&(log_sys->mutex)); |
|
1325 |
||
1326 |
if (flush_to_disk |
|
1327 |
&& ut_dulint_cmp(log_sys->flushed_to_disk_lsn, lsn) >= 0) { |
|
1328 |
||
1329 |
mutex_exit(&(log_sys->mutex)); |
|
1330 |
||
1331 |
return; |
|
1332 |
}
|
|
1333 |
||
1334 |
if (!flush_to_disk |
|
1335 |
&& (ut_dulint_cmp(log_sys->written_to_all_lsn, lsn) >= 0 |
|
1336 |
|| (ut_dulint_cmp(log_sys->written_to_some_lsn, lsn) |
|
1337 |
>= 0 |
|
1338 |
&& wait != LOG_WAIT_ALL_GROUPS))) { |
|
1339 |
||
1340 |
mutex_exit(&(log_sys->mutex)); |
|
1341 |
||
1342 |
return; |
|
1343 |
}
|
|
1344 |
||
1345 |
if (log_sys->n_pending_writes > 0) { |
|
1346 |
/* A write (+ possibly flush to disk) is running */
|
|
1347 |
||
1348 |
if (flush_to_disk |
|
1349 |
&& ut_dulint_cmp(log_sys->current_flush_lsn, lsn) |
|
1350 |
>= 0) { |
|
1351 |
/* The write + flush will write enough: wait for it to
|
|
1352 |
complete */
|
|
1353 |
||
1354 |
goto do_waits; |
|
1355 |
}
|
|
1356 |
||
1357 |
if (!flush_to_disk |
|
1358 |
&& ut_dulint_cmp(log_sys->write_lsn, lsn) >= 0) { |
|
1359 |
/* The write will write enough: wait for it to
|
|
1360 |
complete */
|
|
1361 |
||
1362 |
goto do_waits; |
|
1363 |
}
|
|
1364 |
||
1365 |
mutex_exit(&(log_sys->mutex)); |
|
1366 |
||
1367 |
/* Wait for the write to complete and try to start a new
|
|
1368 |
write */
|
|
1369 |
||
1370 |
os_event_wait(log_sys->no_flush_event); |
|
1371 |
||
1372 |
goto loop; |
|
1373 |
}
|
|
1374 |
||
1375 |
if (!flush_to_disk |
|
1376 |
&& log_sys->buf_free == log_sys->buf_next_to_write) { |
|
1377 |
/* Nothing to write and no flush to disk requested */
|
|
1378 |
||
1379 |
mutex_exit(&(log_sys->mutex)); |
|
1380 |
||
1381 |
return; |
|
1382 |
}
|
|
1383 |
||
1384 |
#ifdef UNIV_DEBUG
|
|
1385 |
if (log_debug_writes) { |
|
1386 |
fprintf(stderr, |
|
1387 |
"Writing log from %lu %lu up to lsn %lu %lu\n", |
|
1388 |
(ulong) ut_dulint_get_high( |
|
1389 |
log_sys->written_to_all_lsn), |
|
1390 |
(ulong) ut_dulint_get_low( |
|
1391 |
log_sys->written_to_all_lsn), |
|
1392 |
(ulong) ut_dulint_get_high(log_sys->lsn), |
|
1393 |
(ulong) ut_dulint_get_low(log_sys->lsn)); |
|
1394 |
}
|
|
1395 |
#endif /* UNIV_DEBUG */ |
|
1396 |
log_sys->n_pending_writes++; |
|
1397 |
||
1398 |
group = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
1399 |
group->n_pending_writes++; /* We assume here that we have only |
|
1400 |
one log group! */
|
|
1401 |
||
1402 |
os_event_reset(log_sys->no_flush_event); |
|
1403 |
os_event_reset(log_sys->one_flushed_event); |
|
1404 |
||
1405 |
start_offset = log_sys->buf_next_to_write; |
|
1406 |
end_offset = log_sys->buf_free; |
|
1407 |
||
1408 |
area_start = ut_calc_align_down(start_offset, OS_FILE_LOG_BLOCK_SIZE); |
|
1409 |
area_end = ut_calc_align(end_offset, OS_FILE_LOG_BLOCK_SIZE); |
|
1410 |
||
1411 |
ut_ad(area_end - area_start > 0); |
|
1412 |
||
1413 |
log_sys->write_lsn = log_sys->lsn; |
|
1414 |
||
1415 |
if (flush_to_disk) { |
|
1416 |
log_sys->current_flush_lsn = log_sys->lsn; |
|
1417 |
}
|
|
1418 |
||
1419 |
log_sys->one_flushed = FALSE; |
|
1420 |
||
1421 |
log_block_set_flush_bit(log_sys->buf + area_start, TRUE); |
|
1422 |
log_block_set_checkpoint_no( |
|
1423 |
log_sys->buf + area_end - OS_FILE_LOG_BLOCK_SIZE, |
|
1424 |
log_sys->next_checkpoint_no); |
|
1425 |
||
1426 |
/* Copy the last, incompletely written, log block a log block length
|
|
1427 |
up, so that when the flush operation writes from the log buffer, the
|
|
1428 |
segment to write will not be changed by writers to the log */
|
|
1429 |
||
1430 |
ut_memcpy(log_sys->buf + area_end, |
|
1431 |
log_sys->buf + area_end - OS_FILE_LOG_BLOCK_SIZE, |
|
1432 |
OS_FILE_LOG_BLOCK_SIZE); |
|
1433 |
||
1434 |
log_sys->buf_free += OS_FILE_LOG_BLOCK_SIZE; |
|
1435 |
log_sys->write_end_offset = log_sys->buf_free; |
|
1436 |
||
1437 |
group = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
1438 |
||
1439 |
/* Do the write to the log files */
|
|
1440 |
||
1441 |
while (group) { |
|
1442 |
log_group_write_buf( |
|
1443 |
group, log_sys->buf + area_start, |
|
1444 |
area_end - area_start, |
|
1445 |
ut_dulint_align_down(log_sys->written_to_all_lsn, |
|
1446 |
OS_FILE_LOG_BLOCK_SIZE), |
|
1447 |
start_offset - area_start); |
|
1448 |
||
1449 |
log_group_set_fields(group, log_sys->write_lsn); |
|
1450 |
||
1451 |
group = UT_LIST_GET_NEXT(log_groups, group); |
|
1452 |
}
|
|
1453 |
||
1454 |
mutex_exit(&(log_sys->mutex)); |
|
1455 |
||
1456 |
if (srv_unix_file_flush_method == SRV_UNIX_O_DSYNC) { |
|
1457 |
/* O_DSYNC means the OS did not buffer the log file at all:
|
|
1458 |
so we have also flushed to disk what we have written */
|
|
1459 |
||
1460 |
log_sys->flushed_to_disk_lsn = log_sys->write_lsn; |
|
1461 |
||
1462 |
} else if (flush_to_disk) { |
|
1463 |
||
1464 |
group = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
1465 |
||
1466 |
fil_flush(group->space_id); |
|
1467 |
log_sys->flushed_to_disk_lsn = log_sys->write_lsn; |
|
1468 |
}
|
|
1469 |
||
1470 |
mutex_enter(&(log_sys->mutex)); |
|
1471 |
||
1472 |
group = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
1473 |
||
1474 |
ut_a(group->n_pending_writes == 1); |
|
1475 |
ut_a(log_sys->n_pending_writes == 1); |
|
1476 |
||
1477 |
group->n_pending_writes--; |
|
1478 |
log_sys->n_pending_writes--; |
|
1479 |
||
1480 |
unlock = log_group_check_flush_completion(group); |
|
1481 |
unlock = unlock | log_sys_check_flush_completion(); |
|
1482 |
||
1483 |
log_flush_do_unlocks(unlock); |
|
1484 |
||
1485 |
mutex_exit(&(log_sys->mutex)); |
|
1486 |
||
1487 |
return; |
|
1488 |
||
1489 |
do_waits: |
|
1490 |
mutex_exit(&(log_sys->mutex)); |
|
1491 |
||
1492 |
if (wait == LOG_WAIT_ONE_GROUP) { |
|
1493 |
os_event_wait(log_sys->one_flushed_event); |
|
1494 |
} else if (wait == LOG_WAIT_ALL_GROUPS) { |
|
1495 |
os_event_wait(log_sys->no_flush_event); |
|
1496 |
} else { |
|
1497 |
ut_ad(wait == LOG_NO_WAIT); |
|
1498 |
}
|
|
1499 |
}
|
|
1500 |
||
1501 |
/********************************************************************
|
|
1502 |
Does a syncronous flush of the log buffer to disk. */
|
|
1503 |
||
1504 |
void
|
|
1505 |
log_buffer_flush_to_disk(void) |
|
1506 |
/*==========================*/
|
|
1507 |
{
|
|
1508 |
dulint lsn; |
|
1509 |
||
1510 |
mutex_enter(&(log_sys->mutex)); |
|
1511 |
||
1512 |
lsn = log_sys->lsn; |
|
1513 |
||
1514 |
mutex_exit(&(log_sys->mutex)); |
|
1515 |
||
1516 |
log_write_up_to(lsn, LOG_WAIT_ALL_GROUPS, TRUE); |
|
1517 |
}
|
|
1518 |
||
1519 |
/********************************************************************
|
|
1520 |
Tries to establish a big enough margin of free space in the log buffer, such
|
|
1521 |
that a new log entry can be catenated without an immediate need for a flush. */
|
|
1522 |
static
|
|
1523 |
void
|
|
1524 |
log_flush_margin(void) |
|
1525 |
/*==================*/
|
|
1526 |
{
|
|
1527 |
ibool do_flush = FALSE; |
|
1528 |
log_t* log = log_sys; |
|
1529 |
dulint lsn; |
|
1530 |
||
1531 |
mutex_enter(&(log->mutex)); |
|
1532 |
||
1533 |
if (log->buf_free > log->max_buf_free) { |
|
1534 |
||
1535 |
if (log->n_pending_writes > 0) { |
|
1536 |
/* A flush is running: hope that it will provide enough
|
|
1537 |
free space */
|
|
1538 |
} else { |
|
1539 |
do_flush = TRUE; |
|
1540 |
lsn = log->lsn; |
|
1541 |
}
|
|
1542 |
}
|
|
1543 |
||
1544 |
mutex_exit(&(log->mutex)); |
|
1545 |
||
1546 |
if (do_flush) { |
|
1547 |
log_write_up_to(lsn, LOG_NO_WAIT, FALSE); |
|
1548 |
}
|
|
1549 |
}
|
|
1550 |
||
1551 |
/********************************************************************
|
|
1552 |
Advances the smallest lsn for which there are unflushed dirty blocks in the
|
|
1553 |
buffer pool. NOTE: this function may only be called if the calling thread owns
|
|
1554 |
no synchronization objects! */
|
|
1555 |
||
1556 |
ibool
|
|
1557 |
log_preflush_pool_modified_pages( |
|
1558 |
/*=============================*/
|
|
1559 |
/* out: FALSE if there was a flush batch of
|
|
1560 |
the same type running, which means that we
|
|
1561 |
could not start this flush batch */
|
|
1562 |
dulint new_oldest, /* in: try to advance oldest_modified_lsn |
|
1563 |
at least to this lsn */
|
|
1564 |
ibool sync) /* in: TRUE if synchronous operation is |
|
1565 |
desired */
|
|
1566 |
{
|
|
1567 |
ulint n_pages; |
|
1568 |
||
1569 |
if (recv_recovery_on) { |
|
1570 |
/* If the recovery is running, we must first apply all
|
|
1571 |
log records to their respective file pages to get the
|
|
1572 |
right modify lsn values to these pages: otherwise, there
|
|
1573 |
might be pages on disk which are not yet recovered to the
|
|
1574 |
current lsn, and even after calling this function, we could
|
|
1575 |
not know how up-to-date the disk version of the database is,
|
|
1576 |
and we could not make a new checkpoint on the basis of the
|
|
1577 |
info on the buffer pool only. */
|
|
1578 |
||
1579 |
recv_apply_hashed_log_recs(TRUE); |
|
1580 |
}
|
|
1581 |
||
1582 |
n_pages = buf_flush_batch(BUF_FLUSH_LIST, ULINT_MAX, new_oldest); |
|
1583 |
||
1584 |
if (sync) { |
|
1585 |
buf_flush_wait_batch_end(BUF_FLUSH_LIST); |
|
1586 |
}
|
|
1587 |
||
1588 |
if (n_pages == ULINT_UNDEFINED) { |
|
1589 |
||
1590 |
return(FALSE); |
|
1591 |
}
|
|
1592 |
||
1593 |
return(TRUE); |
|
1594 |
}
|
|
1595 |
||
1596 |
/**********************************************************
|
|
1597 |
Completes a checkpoint. */
|
|
1598 |
static
|
|
1599 |
void
|
|
1600 |
log_complete_checkpoint(void) |
|
1601 |
/*=========================*/
|
|
1602 |
{
|
|
1603 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
1604 |
ut_ad(log_sys->n_pending_checkpoint_writes == 0); |
|
1605 |
||
1606 |
log_sys->next_checkpoint_no |
|
1607 |
= ut_dulint_add(log_sys->next_checkpoint_no, 1); |
|
1608 |
||
1609 |
log_sys->last_checkpoint_lsn = log_sys->next_checkpoint_lsn; |
|
1610 |
||
1611 |
rw_lock_x_unlock_gen(&(log_sys->checkpoint_lock), LOG_CHECKPOINT); |
|
1612 |
}
|
|
1613 |
||
1614 |
/**********************************************************
|
|
1615 |
Completes an asynchronous checkpoint info write i/o to a log file. */
|
|
1616 |
static
|
|
1617 |
void
|
|
1618 |
log_io_complete_checkpoint(void) |
|
1619 |
/*============================*/
|
|
1620 |
{
|
|
1621 |
mutex_enter(&(log_sys->mutex)); |
|
1622 |
||
1623 |
ut_ad(log_sys->n_pending_checkpoint_writes > 0); |
|
1624 |
||
1625 |
log_sys->n_pending_checkpoint_writes--; |
|
1626 |
||
1627 |
if (log_sys->n_pending_checkpoint_writes == 0) { |
|
1628 |
log_complete_checkpoint(); |
|
1629 |
}
|
|
1630 |
||
1631 |
mutex_exit(&(log_sys->mutex)); |
|
1632 |
}
|
|
1633 |
||
1634 |
/***********************************************************************
|
|
1635 |
Writes info to a checkpoint about a log group. */
|
|
1636 |
static
|
|
1637 |
void
|
|
1638 |
log_checkpoint_set_nth_group_info( |
|
1639 |
/*==============================*/
|
|
1640 |
byte* buf, /* in: buffer for checkpoint info */ |
|
1641 |
ulint n, /* in: nth slot */ |
|
1642 |
ulint file_no,/* in: archived file number */ |
|
1643 |
ulint offset) /* in: archived file offset */ |
|
1644 |
{
|
|
1645 |
ut_ad(n < LOG_MAX_N_GROUPS); |
|
1646 |
||
1647 |
mach_write_to_4(buf + LOG_CHECKPOINT_GROUP_ARRAY |
|
1648 |
+ 8 * n + LOG_CHECKPOINT_ARCHIVED_FILE_NO, file_no); |
|
1649 |
mach_write_to_4(buf + LOG_CHECKPOINT_GROUP_ARRAY |
|
1650 |
+ 8 * n + LOG_CHECKPOINT_ARCHIVED_OFFSET, offset); |
|
1651 |
}
|
|
1652 |
||
1653 |
/***********************************************************************
|
|
1654 |
Gets info from a checkpoint about a log group. */
|
|
1655 |
||
1656 |
void
|
|
1657 |
log_checkpoint_get_nth_group_info( |
|
1658 |
/*==============================*/
|
|
1659 |
byte* buf, /* in: buffer containing checkpoint info */ |
|
1660 |
ulint n, /* in: nth slot */ |
|
1661 |
ulint* file_no,/* out: archived file number */ |
|
1662 |
ulint* offset) /* out: archived file offset */ |
|
1663 |
{
|
|
1664 |
ut_ad(n < LOG_MAX_N_GROUPS); |
|
1665 |
||
1666 |
*file_no = mach_read_from_4(buf + LOG_CHECKPOINT_GROUP_ARRAY |
|
1667 |
+ 8 * n + LOG_CHECKPOINT_ARCHIVED_FILE_NO); |
|
1668 |
*offset = mach_read_from_4(buf + LOG_CHECKPOINT_GROUP_ARRAY |
|
1669 |
+ 8 * n + LOG_CHECKPOINT_ARCHIVED_OFFSET); |
|
1670 |
}
|
|
1671 |
||
1672 |
/**********************************************************
|
|
1673 |
Writes the checkpoint info to a log group header. */
|
|
1674 |
static
|
|
1675 |
void
|
|
1676 |
log_group_checkpoint( |
|
1677 |
/*=================*/
|
|
1678 |
log_group_t* group) /* in: log group */ |
|
1679 |
{
|
|
1680 |
log_group_t* group2; |
|
1681 |
#ifdef UNIV_LOG_ARCHIVE
|
|
1682 |
dulint archived_lsn; |
|
1683 |
dulint next_archived_lsn; |
|
1684 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
1685 |
ulint write_offset; |
|
1686 |
ulint fold; |
|
1687 |
byte* buf; |
|
1688 |
ulint i; |
|
1689 |
||
1690 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
1691 |
#if LOG_CHECKPOINT_SIZE > OS_FILE_LOG_BLOCK_SIZE
|
|
1692 |
# error "LOG_CHECKPOINT_SIZE > OS_FILE_LOG_BLOCK_SIZE"
|
|
1693 |
#endif
|
|
1694 |
||
1695 |
buf = group->checkpoint_buf; |
|
1696 |
||
1697 |
mach_write_to_8(buf + LOG_CHECKPOINT_NO, log_sys->next_checkpoint_no); |
|
1698 |
mach_write_to_8(buf + LOG_CHECKPOINT_LSN, |
|
1699 |
log_sys->next_checkpoint_lsn); |
|
1700 |
||
1701 |
mach_write_to_4(buf + LOG_CHECKPOINT_OFFSET, |
|
1702 |
log_group_calc_lsn_offset( |
|
1703 |
log_sys->next_checkpoint_lsn, group)); |
|
1704 |
||
1705 |
mach_write_to_4(buf + LOG_CHECKPOINT_LOG_BUF_SIZE, log_sys->buf_size); |
|
1706 |
||
1707 |
#ifdef UNIV_LOG_ARCHIVE
|
|
1708 |
if (log_sys->archiving_state == LOG_ARCH_OFF) { |
|
1709 |
archived_lsn = ut_dulint_max; |
|
1710 |
} else { |
|
1711 |
archived_lsn = log_sys->archived_lsn; |
|
1712 |
||
1713 |
if (0 != ut_dulint_cmp(archived_lsn, |
|
1714 |
log_sys->next_archived_lsn)) { |
|
1715 |
next_archived_lsn = log_sys->next_archived_lsn; |
|
1716 |
/* For debugging only */
|
|
1717 |
}
|
|
1718 |
}
|
|
1719 |
||
1720 |
mach_write_to_8(buf + LOG_CHECKPOINT_ARCHIVED_LSN, archived_lsn); |
|
1721 |
#else /* UNIV_LOG_ARCHIVE */ |
|
1722 |
mach_write_to_8(buf + LOG_CHECKPOINT_ARCHIVED_LSN, ut_dulint_max); |
|
1723 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
1724 |
||
1725 |
for (i = 0; i < LOG_MAX_N_GROUPS; i++) { |
|
1726 |
log_checkpoint_set_nth_group_info(buf, i, 0, 0); |
|
1727 |
}
|
|
1728 |
||
1729 |
group2 = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
1730 |
||
1731 |
while (group2) { |
|
1732 |
log_checkpoint_set_nth_group_info(buf, group2->id, |
|
1733 |
#ifdef UNIV_LOG_ARCHIVE
|
|
1734 |
group2->archived_file_no, |
|
1735 |
group2->archived_offset |
|
1736 |
#else /* UNIV_LOG_ARCHIVE */ |
|
1737 |
0, 0 |
|
1738 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
1739 |
);
|
|
1740 |
||
1741 |
group2 = UT_LIST_GET_NEXT(log_groups, group2); |
|
1742 |
}
|
|
1743 |
||
1744 |
fold = ut_fold_binary(buf, LOG_CHECKPOINT_CHECKSUM_1); |
|
1745 |
mach_write_to_4(buf + LOG_CHECKPOINT_CHECKSUM_1, fold); |
|
1746 |
||
1747 |
fold = ut_fold_binary(buf + LOG_CHECKPOINT_LSN, |
|
1748 |
LOG_CHECKPOINT_CHECKSUM_2 - LOG_CHECKPOINT_LSN); |
|
1749 |
mach_write_to_4(buf + LOG_CHECKPOINT_CHECKSUM_2, fold); |
|
1750 |
||
1751 |
/* Starting from InnoDB-3.23.50, we also write info on allocated
|
|
1752 |
size in the tablespace */
|
|
1753 |
||
1754 |
mach_write_to_4(buf + LOG_CHECKPOINT_FSP_FREE_LIMIT, |
|
1755 |
log_fsp_current_free_limit); |
|
1756 |
||
1757 |
mach_write_to_4(buf + LOG_CHECKPOINT_FSP_MAGIC_N, |
|
1758 |
LOG_CHECKPOINT_FSP_MAGIC_N_VAL); |
|
1759 |
||
1760 |
/* We alternate the physical place of the checkpoint info in the first
|
|
1761 |
log file */
|
|
1762 |
||
1763 |
if (ut_dulint_get_low(log_sys->next_checkpoint_no) % 2 == 0) { |
|
1764 |
write_offset = LOG_CHECKPOINT_1; |
|
1765 |
} else { |
|
1766 |
write_offset = LOG_CHECKPOINT_2; |
|
1767 |
}
|
|
1768 |
||
1769 |
if (log_do_write) { |
|
1770 |
if (log_sys->n_pending_checkpoint_writes == 0) { |
|
1771 |
||
1772 |
rw_lock_x_lock_gen(&(log_sys->checkpoint_lock), |
|
1773 |
LOG_CHECKPOINT); |
|
1774 |
}
|
|
1775 |
||
1776 |
log_sys->n_pending_checkpoint_writes++; |
|
1777 |
||
1778 |
log_sys->n_log_ios++; |
|
1779 |
||
1780 |
/* We send as the last parameter the group machine address
|
|
1781 |
added with 1, as we want to distinguish between a normal log
|
|
1782 |
file write and a checkpoint field write */
|
|
1783 |
||
1784 |
fil_io(OS_FILE_WRITE | OS_FILE_LOG, FALSE, group->space_id, |
|
1785 |
write_offset / UNIV_PAGE_SIZE, |
|
1786 |
write_offset % UNIV_PAGE_SIZE, |
|
1787 |
OS_FILE_LOG_BLOCK_SIZE, |
|
1788 |
buf, ((byte*)group + 1)); |
|
1789 |
||
1790 |
ut_ad(((ulint)group & 0x1UL) == 0); |
|
1791 |
}
|
|
1792 |
}
|
|
1793 |
||
1794 |
/**********************************************************
|
|
1795 |
Writes info to a buffer of a log group when log files are created in
|
|
1796 |
backup restoration. */
|
|
1797 |
||
1798 |
void
|
|
1799 |
log_reset_first_header_and_checkpoint( |
|
1800 |
/*==================================*/
|
|
1801 |
byte* hdr_buf,/* in: buffer which will be written to the start |
|
1802 |
of the first log file */
|
|
1803 |
dulint start) /* in: lsn of the start of the first log file; |
|
1804 |
we pretend that there is a checkpoint at
|
|
1805 |
start + LOG_BLOCK_HDR_SIZE */
|
|
1806 |
{
|
|
1807 |
ulint fold; |
|
1808 |
byte* buf; |
|
1809 |
dulint lsn; |
|
1810 |
||
1811 |
mach_write_to_4(hdr_buf + LOG_GROUP_ID, 0); |
|
1812 |
mach_write_to_8(hdr_buf + LOG_FILE_START_LSN, start); |
|
1813 |
||
1814 |
lsn = ut_dulint_add(start, LOG_BLOCK_HDR_SIZE); |
|
1815 |
||
1816 |
/* Write the label of ibbackup --restore */
|
|
1817 |
strcpy((char*) hdr_buf + LOG_FILE_WAS_CREATED_BY_HOT_BACKUP, |
|
1818 |
"ibbackup "); |
|
1819 |
ut_sprintf_timestamp((char*) hdr_buf |
|
1820 |
+ (LOG_FILE_WAS_CREATED_BY_HOT_BACKUP |
|
1821 |
+ (sizeof "ibbackup ") - 1)); |
|
1822 |
buf = hdr_buf + LOG_CHECKPOINT_1; |
|
1823 |
||
1824 |
mach_write_to_8(buf + LOG_CHECKPOINT_NO, ut_dulint_zero); |
|
1825 |
mach_write_to_8(buf + LOG_CHECKPOINT_LSN, lsn); |
|
1826 |
||
1827 |
mach_write_to_4(buf + LOG_CHECKPOINT_OFFSET, |
|
1828 |
LOG_FILE_HDR_SIZE + LOG_BLOCK_HDR_SIZE); |
|
1829 |
||
1830 |
mach_write_to_4(buf + LOG_CHECKPOINT_LOG_BUF_SIZE, 2 * 1024 * 1024); |
|
1831 |
||
1832 |
mach_write_to_8(buf + LOG_CHECKPOINT_ARCHIVED_LSN, ut_dulint_max); |
|
1833 |
||
1834 |
fold = ut_fold_binary(buf, LOG_CHECKPOINT_CHECKSUM_1); |
|
1835 |
mach_write_to_4(buf + LOG_CHECKPOINT_CHECKSUM_1, fold); |
|
1836 |
||
1837 |
fold = ut_fold_binary(buf + LOG_CHECKPOINT_LSN, |
|
1838 |
LOG_CHECKPOINT_CHECKSUM_2 - LOG_CHECKPOINT_LSN); |
|
1839 |
mach_write_to_4(buf + LOG_CHECKPOINT_CHECKSUM_2, fold); |
|
1840 |
||
1841 |
/* Starting from InnoDB-3.23.50, we should also write info on
|
|
1842 |
allocated size in the tablespace, but unfortunately we do not
|
|
1843 |
know it here */
|
|
1844 |
}
|
|
1845 |
||
1846 |
/**********************************************************
|
|
1847 |
Reads a checkpoint info from a log group header to log_sys->checkpoint_buf. */
|
|
1848 |
||
1849 |
void
|
|
1850 |
log_group_read_checkpoint_info( |
|
1851 |
/*===========================*/
|
|
1852 |
log_group_t* group, /* in: log group */ |
|
1853 |
ulint field) /* in: LOG_CHECKPOINT_1 or LOG_CHECKPOINT_2 */ |
|
1854 |
{
|
|
1855 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
1856 |
||
1857 |
log_sys->n_log_ios++; |
|
1858 |
||
1859 |
fil_io(OS_FILE_READ | OS_FILE_LOG, TRUE, group->space_id, |
|
1860 |
field / UNIV_PAGE_SIZE, field % UNIV_PAGE_SIZE, |
|
1861 |
OS_FILE_LOG_BLOCK_SIZE, log_sys->checkpoint_buf, NULL); |
|
1862 |
}
|
|
1863 |
||
1864 |
/**********************************************************
|
|
1865 |
Writes checkpoint info to groups. */
|
|
1866 |
||
1867 |
void
|
|
1868 |
log_groups_write_checkpoint_info(void) |
|
1869 |
/*==================================*/
|
|
1870 |
{
|
|
1871 |
log_group_t* group; |
|
1872 |
||
1873 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
1874 |
||
1875 |
group = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
1876 |
||
1877 |
while (group) { |
|
1878 |
log_group_checkpoint(group); |
|
1879 |
||
1880 |
group = UT_LIST_GET_NEXT(log_groups, group); |
|
1881 |
}
|
|
1882 |
}
|
|
1883 |
||
1884 |
/**********************************************************
|
|
1885 |
Makes a checkpoint. Note that this function does not flush dirty
|
|
1886 |
blocks from the buffer pool: it only checks what is lsn of the oldest
|
|
1887 |
modification in the pool, and writes information about the lsn in
|
|
1888 |
log files. Use log_make_checkpoint_at to flush also the pool. */
|
|
1889 |
||
1890 |
ibool
|
|
1891 |
log_checkpoint( |
|
1892 |
/*===========*/
|
|
1893 |
/* out: TRUE if success, FALSE if a checkpoint
|
|
1894 |
write was already running */
|
|
1895 |
ibool sync, /* in: TRUE if synchronous operation is |
|
1896 |
desired */
|
|
1897 |
ibool write_always) /* in: the function normally checks if the |
|
1898 |
the new checkpoint would have a greater
|
|
1899 |
lsn than the previous one: if not, then no
|
|
1900 |
physical write is done; by setting this
|
|
1901 |
parameter TRUE, a physical write will always be
|
|
1902 |
made to log files */
|
|
1903 |
{
|
|
1904 |
dulint oldest_lsn; |
|
1905 |
||
1906 |
if (recv_recovery_is_on()) { |
|
1907 |
recv_apply_hashed_log_recs(TRUE); |
|
1908 |
}
|
|
1909 |
||
1910 |
if (srv_unix_file_flush_method != SRV_UNIX_NOSYNC) { |
|
1911 |
fil_flush_file_spaces(FIL_TABLESPACE); |
|
1912 |
}
|
|
1913 |
||
1914 |
mutex_enter(&(log_sys->mutex)); |
|
1915 |
||
1916 |
oldest_lsn = log_buf_pool_get_oldest_modification(); |
|
1917 |
||
1918 |
mutex_exit(&(log_sys->mutex)); |
|
1919 |
||
1920 |
/* Because log also contains headers and dummy log records,
|
|
1921 |
if the buffer pool contains no dirty buffers, oldest_lsn
|
|
1922 |
gets the value log_sys->lsn from the previous function,
|
|
1923 |
and we must make sure that the log is flushed up to that
|
|
1924 |
lsn. If there are dirty buffers in the buffer pool, then our
|
|
1925 |
write-ahead-logging algorithm ensures that the log has been flushed
|
|
1926 |
up to oldest_lsn. */
|
|
1927 |
||
1928 |
log_write_up_to(oldest_lsn, LOG_WAIT_ALL_GROUPS, TRUE); |
|
1929 |
||
1930 |
mutex_enter(&(log_sys->mutex)); |
|
1931 |
||
1932 |
if (!write_always |
|
1933 |
&& ut_dulint_cmp(log_sys->last_checkpoint_lsn, oldest_lsn) >= 0) { |
|
1934 |
||
1935 |
mutex_exit(&(log_sys->mutex)); |
|
1936 |
||
1937 |
return(TRUE); |
|
1938 |
}
|
|
1939 |
||
1940 |
ut_ad(ut_dulint_cmp(log_sys->written_to_all_lsn, oldest_lsn) >= 0); |
|
1941 |
||
1942 |
if (log_sys->n_pending_checkpoint_writes > 0) { |
|
1943 |
/* A checkpoint write is running */
|
|
1944 |
||
1945 |
mutex_exit(&(log_sys->mutex)); |
|
1946 |
||
1947 |
if (sync) { |
|
1948 |
/* Wait for the checkpoint write to complete */
|
|
1949 |
rw_lock_s_lock(&(log_sys->checkpoint_lock)); |
|
1950 |
rw_lock_s_unlock(&(log_sys->checkpoint_lock)); |
|
1951 |
}
|
|
1952 |
||
1953 |
return(FALSE); |
|
1954 |
}
|
|
1955 |
||
1956 |
log_sys->next_checkpoint_lsn = oldest_lsn; |
|
1957 |
||
1958 |
#ifdef UNIV_DEBUG
|
|
1959 |
if (log_debug_writes) { |
|
1960 |
fprintf(stderr, "Making checkpoint no %lu at lsn %lu %lu\n", |
|
1961 |
(ulong) ut_dulint_get_low(log_sys->next_checkpoint_no), |
|
1962 |
(ulong) ut_dulint_get_high(oldest_lsn), |
|
1963 |
(ulong) ut_dulint_get_low(oldest_lsn)); |
|
1964 |
}
|
|
1965 |
#endif /* UNIV_DEBUG */ |
|
1966 |
||
1967 |
log_groups_write_checkpoint_info(); |
|
1968 |
||
1969 |
mutex_exit(&(log_sys->mutex)); |
|
1970 |
||
1971 |
if (sync) { |
|
1972 |
/* Wait for the checkpoint write to complete */
|
|
1973 |
rw_lock_s_lock(&(log_sys->checkpoint_lock)); |
|
1974 |
rw_lock_s_unlock(&(log_sys->checkpoint_lock)); |
|
1975 |
}
|
|
1976 |
||
1977 |
return(TRUE); |
|
1978 |
}
|
|
1979 |
||
1980 |
/********************************************************************
|
|
1981 |
Makes a checkpoint at a given lsn or later. */
|
|
1982 |
||
1983 |
void
|
|
1984 |
log_make_checkpoint_at( |
|
1985 |
/*===================*/
|
|
1986 |
dulint lsn, /* in: make a checkpoint at this or a later |
|
1987 |
lsn, if ut_dulint_max, makes a checkpoint at
|
|
1988 |
the latest lsn */
|
|
1989 |
ibool write_always) /* in: the function normally checks if the |
|
1990 |
the new checkpoint would have a greater
|
|
1991 |
lsn than the previous one: if not, then no
|
|
1992 |
physical write is done; by setting this
|
|
1993 |
parameter TRUE, a physical write will always be
|
|
1994 |
made to log files */
|
|
1995 |
{
|
|
1996 |
ibool success; |
|
1997 |
||
1998 |
/* Preflush pages synchronously */
|
|
1999 |
||
2000 |
success = FALSE; |
|
2001 |
||
2002 |
while (!success) { |
|
2003 |
success = log_preflush_pool_modified_pages(lsn, TRUE); |
|
2004 |
}
|
|
2005 |
||
2006 |
success = FALSE; |
|
2007 |
||
2008 |
while (!success) { |
|
2009 |
success = log_checkpoint(TRUE, write_always); |
|
2010 |
}
|
|
2011 |
}
|
|
2012 |
||
2013 |
/********************************************************************
|
|
2014 |
Tries to establish a big enough margin of free space in the log groups, such
|
|
2015 |
that a new log entry can be catenated without an immediate need for a
|
|
2016 |
checkpoint. NOTE: this function may only be called if the calling thread
|
|
2017 |
owns no synchronization objects! */
|
|
2018 |
static
|
|
2019 |
void
|
|
2020 |
log_checkpoint_margin(void) |
|
2021 |
/*=======================*/
|
|
2022 |
{
|
|
2023 |
log_t* log = log_sys; |
|
2024 |
ulint age; |
|
2025 |
ulint checkpoint_age; |
|
2026 |
ulint advance; |
|
2027 |
dulint oldest_lsn; |
|
2028 |
ibool sync; |
|
2029 |
ibool checkpoint_sync; |
|
2030 |
ibool do_checkpoint; |
|
2031 |
ibool success; |
|
2032 |
loop: |
|
2033 |
sync = FALSE; |
|
2034 |
checkpoint_sync = FALSE; |
|
2035 |
do_checkpoint = FALSE; |
|
2036 |
||
2037 |
mutex_enter(&(log->mutex)); |
|
2038 |
||
2039 |
if (log->check_flush_or_checkpoint == FALSE) { |
|
2040 |
mutex_exit(&(log->mutex)); |
|
2041 |
||
2042 |
return; |
|
2043 |
}
|
|
2044 |
||
2045 |
oldest_lsn = log_buf_pool_get_oldest_modification(); |
|
2046 |
||
2047 |
age = ut_dulint_minus(log->lsn, oldest_lsn); |
|
2048 |
||
2049 |
if (age > log->max_modified_age_sync) { |
|
2050 |
||
2051 |
/* A flush is urgent: we have to do a synchronous preflush */
|
|
2052 |
||
2053 |
sync = TRUE; |
|
2054 |
advance = 2 * (age - log->max_modified_age_sync); |
|
2055 |
} else if (age > log->max_modified_age_async) { |
|
2056 |
||
2057 |
/* A flush is not urgent: we do an asynchronous preflush */
|
|
2058 |
advance = age - log->max_modified_age_async; |
|
2059 |
} else { |
|
2060 |
advance = 0; |
|
2061 |
}
|
|
2062 |
||
2063 |
checkpoint_age = ut_dulint_minus(log->lsn, log->last_checkpoint_lsn); |
|
2064 |
||
2065 |
if (checkpoint_age > log->max_checkpoint_age) { |
|
2066 |
/* A checkpoint is urgent: we do it synchronously */
|
|
2067 |
||
2068 |
checkpoint_sync = TRUE; |
|
2069 |
||
2070 |
do_checkpoint = TRUE; |
|
2071 |
||
2072 |
} else if (checkpoint_age > log->max_checkpoint_age_async) { |
|
2073 |
/* A checkpoint is not urgent: do it asynchronously */
|
|
2074 |
||
2075 |
do_checkpoint = TRUE; |
|
2076 |
||
2077 |
log->check_flush_or_checkpoint = FALSE; |
|
2078 |
} else { |
|
2079 |
log->check_flush_or_checkpoint = FALSE; |
|
2080 |
}
|
|
2081 |
||
2082 |
mutex_exit(&(log->mutex)); |
|
2083 |
||
2084 |
if (advance) { |
|
2085 |
dulint new_oldest = ut_dulint_add(oldest_lsn, advance); |
|
2086 |
||
2087 |
success = log_preflush_pool_modified_pages(new_oldest, sync); |
|
2088 |
||
2089 |
/* If the flush succeeded, this thread has done its part
|
|
2090 |
and can proceed. If it did not succeed, there was another
|
|
2091 |
thread doing a flush at the same time. If sync was FALSE,
|
|
2092 |
the flush was not urgent, and we let this thread proceed.
|
|
2093 |
Otherwise, we let it start from the beginning again. */
|
|
2094 |
||
2095 |
if (sync && !success) { |
|
2096 |
mutex_enter(&(log->mutex)); |
|
2097 |
||
2098 |
log->check_flush_or_checkpoint = TRUE; |
|
2099 |
||
2100 |
mutex_exit(&(log->mutex)); |
|
2101 |
goto loop; |
|
2102 |
}
|
|
2103 |
}
|
|
2104 |
||
2105 |
if (do_checkpoint) { |
|
2106 |
log_checkpoint(checkpoint_sync, FALSE); |
|
2107 |
||
2108 |
if (checkpoint_sync) { |
|
2109 |
||
2110 |
goto loop; |
|
2111 |
}
|
|
2112 |
}
|
|
2113 |
}
|
|
2114 |
||
2115 |
/**********************************************************
|
|
2116 |
Reads a specified log segment to a buffer. */
|
|
2117 |
||
2118 |
void
|
|
2119 |
log_group_read_log_seg( |
|
2120 |
/*===================*/
|
|
2121 |
ulint type, /* in: LOG_ARCHIVE or LOG_RECOVER */ |
|
2122 |
byte* buf, /* in: buffer where to read */ |
|
2123 |
log_group_t* group, /* in: log group */ |
|
2124 |
dulint start_lsn, /* in: read area start */ |
|
2125 |
dulint end_lsn) /* in: read area end */ |
|
2126 |
{
|
|
2127 |
ulint len; |
|
2128 |
ulint source_offset; |
|
2129 |
ibool sync; |
|
2130 |
||
2131 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
2132 |
||
2133 |
sync = FALSE; |
|
2134 |
||
2135 |
if (type == LOG_RECOVER) { |
|
2136 |
sync = TRUE; |
|
2137 |
}
|
|
2138 |
loop: |
|
2139 |
source_offset = log_group_calc_lsn_offset(start_lsn, group); |
|
2140 |
||
2141 |
len = ut_dulint_minus(end_lsn, start_lsn); |
|
2142 |
||
2143 |
ut_ad(len != 0); |
|
2144 |
||
2145 |
if ((source_offset % group->file_size) + len > group->file_size) { |
|
2146 |
||
2147 |
len = group->file_size - (source_offset % group->file_size); |
|
2148 |
}
|
|
2149 |
||
2150 |
#ifdef UNIV_LOG_ARCHIVE
|
|
2151 |
if (type == LOG_ARCHIVE) { |
|
2152 |
||
2153 |
log_sys->n_pending_archive_ios++; |
|
2154 |
}
|
|
2155 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
2156 |
||
2157 |
log_sys->n_log_ios++; |
|
2158 |
||
2159 |
fil_io(OS_FILE_READ | OS_FILE_LOG, sync, group->space_id, |
|
2160 |
source_offset / UNIV_PAGE_SIZE, source_offset % UNIV_PAGE_SIZE, |
|
2161 |
len, buf, NULL); |
|
2162 |
||
2163 |
start_lsn = ut_dulint_add(start_lsn, len); |
|
2164 |
buf += len; |
|
2165 |
||
2166 |
if (ut_dulint_cmp(start_lsn, end_lsn) != 0) { |
|
2167 |
||
2168 |
goto loop; |
|
2169 |
}
|
|
2170 |
}
|
|
2171 |
||
2172 |
#ifdef UNIV_LOG_ARCHIVE
|
|
2173 |
/**********************************************************
|
|
2174 |
Generates an archived log file name. */
|
|
2175 |
||
2176 |
void
|
|
2177 |
log_archived_file_name_gen( |
|
2178 |
/*=======================*/
|
|
2179 |
char* buf, /* in: buffer where to write */ |
|
2180 |
ulint id __attribute__((unused)), |
|
2181 |
/* in: group id;
|
|
2182 |
currently we only archive the first group */
|
|
2183 |
ulint file_no)/* in: file number */ |
|
2184 |
{
|
|
2185 |
sprintf(buf, "%sib_arch_log_%010lu", srv_arch_dir, (ulong) file_no); |
|
2186 |
}
|
|
2187 |
||
2188 |
/**********************************************************
|
|
2189 |
Writes a log file header to a log file space. */
|
|
2190 |
static
|
|
2191 |
void
|
|
2192 |
log_group_archive_file_header_write( |
|
2193 |
/*================================*/
|
|
2194 |
log_group_t* group, /* in: log group */ |
|
2195 |
ulint nth_file, /* in: header to the nth file in the |
|
2196 |
archive log file space */
|
|
2197 |
ulint file_no, /* in: archived file number */ |
|
2198 |
dulint start_lsn) /* in: log file data starts at this |
|
2199 |
lsn */
|
|
2200 |
{
|
|
2201 |
byte* buf; |
|
2202 |
ulint dest_offset; |
|
2203 |
||
2204 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
2205 |
||
2206 |
ut_a(nth_file < group->n_files); |
|
2207 |
||
2208 |
buf = *(group->archive_file_header_bufs + nth_file); |
|
2209 |
||
2210 |
mach_write_to_4(buf + LOG_GROUP_ID, group->id); |
|
2211 |
mach_write_to_8(buf + LOG_FILE_START_LSN, start_lsn); |
|
2212 |
mach_write_to_4(buf + LOG_FILE_NO, file_no); |
|
2213 |
||
2214 |
mach_write_to_4(buf + LOG_FILE_ARCH_COMPLETED, FALSE); |
|
2215 |
||
2216 |
dest_offset = nth_file * group->file_size; |
|
2217 |
||
2218 |
log_sys->n_log_ios++; |
|
2219 |
||
2220 |
fil_io(OS_FILE_WRITE | OS_FILE_LOG, TRUE, group->archive_space_id, |
|
2221 |
dest_offset / UNIV_PAGE_SIZE, |
|
2222 |
dest_offset % UNIV_PAGE_SIZE, |
|
2223 |
2 * OS_FILE_LOG_BLOCK_SIZE, |
|
2224 |
buf, &log_archive_io); |
|
2225 |
}
|
|
2226 |
||
2227 |
/**********************************************************
|
|
2228 |
Writes a log file header to a completed archived log file. */
|
|
2229 |
static
|
|
2230 |
void
|
|
2231 |
log_group_archive_completed_header_write( |
|
2232 |
/*=====================================*/
|
|
2233 |
log_group_t* group, /* in: log group */ |
|
2234 |
ulint nth_file, /* in: header to the nth file in the |
|
2235 |
archive log file space */
|
|
2236 |
dulint end_lsn) /* in: end lsn of the file */ |
|
2237 |
{
|
|
2238 |
byte* buf; |
|
2239 |
ulint dest_offset; |
|
2240 |
||
2241 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
2242 |
ut_a(nth_file < group->n_files); |
|
2243 |
||
2244 |
buf = *(group->archive_file_header_bufs + nth_file); |
|
2245 |
||
2246 |
mach_write_to_4(buf + LOG_FILE_ARCH_COMPLETED, TRUE); |
|
2247 |
mach_write_to_8(buf + LOG_FILE_END_LSN, end_lsn); |
|
2248 |
||
2249 |
dest_offset = nth_file * group->file_size + LOG_FILE_ARCH_COMPLETED; |
|
2250 |
||
2251 |
log_sys->n_log_ios++; |
|
2252 |
||
2253 |
fil_io(OS_FILE_WRITE | OS_FILE_LOG, TRUE, group->archive_space_id, |
|
2254 |
dest_offset / UNIV_PAGE_SIZE, |
|
2255 |
dest_offset % UNIV_PAGE_SIZE, |
|
2256 |
OS_FILE_LOG_BLOCK_SIZE, |
|
2257 |
buf + LOG_FILE_ARCH_COMPLETED, |
|
2258 |
&log_archive_io); |
|
2259 |
}
|
|
2260 |
||
2261 |
/**********************************************************
|
|
2262 |
Does the archive writes for a single log group. */
|
|
2263 |
static
|
|
2264 |
void
|
|
2265 |
log_group_archive( |
|
2266 |
/*==============*/
|
|
2267 |
log_group_t* group) /* in: log group */ |
|
2268 |
{
|
|
2269 |
os_file_t file_handle; |
|
2270 |
dulint start_lsn; |
|
2271 |
dulint end_lsn; |
|
2272 |
char name[1024]; |
|
2273 |
byte* buf; |
|
2274 |
ulint len; |
|
2275 |
ibool ret; |
|
2276 |
ulint next_offset; |
|
2277 |
ulint n_files; |
|
2278 |
ulint open_mode; |
|
2279 |
||
2280 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
2281 |
||
2282 |
start_lsn = log_sys->archived_lsn; |
|
2283 |
||
2284 |
ut_a(ut_dulint_get_low(start_lsn) % OS_FILE_LOG_BLOCK_SIZE == 0); |
|
2285 |
||
2286 |
end_lsn = log_sys->next_archived_lsn; |
|
2287 |
||
2288 |
ut_a(ut_dulint_get_low(end_lsn) % OS_FILE_LOG_BLOCK_SIZE == 0); |
|
2289 |
||
2290 |
buf = log_sys->archive_buf; |
|
2291 |
||
2292 |
n_files = 0; |
|
2293 |
||
2294 |
next_offset = group->archived_offset; |
|
2295 |
loop: |
|
2296 |
if ((next_offset % group->file_size == 0) |
|
2297 |
|| (fil_space_get_size(group->archive_space_id) == 0)) { |
|
2298 |
||
2299 |
/* Add the file to the archive file space; create or open the
|
|
2300 |
file */
|
|
2301 |
||
2302 |
if (next_offset % group->file_size == 0) { |
|
2303 |
open_mode = OS_FILE_CREATE; |
|
2304 |
} else { |
|
2305 |
open_mode = OS_FILE_OPEN; |
|
2306 |
}
|
|
2307 |
||
2308 |
log_archived_file_name_gen(name, group->id, |
|
2309 |
group->archived_file_no + n_files); |
|
2310 |
||
2311 |
file_handle = os_file_create(name, open_mode, OS_FILE_AIO, |
|
2312 |
OS_DATA_FILE, &ret); |
|
2313 |
||
2314 |
if (!ret && (open_mode == OS_FILE_CREATE)) { |
|
2315 |
file_handle = os_file_create( |
|
2316 |
name, OS_FILE_OPEN, OS_FILE_AIO, |
|
2317 |
OS_DATA_FILE, &ret); |
|
2318 |
}
|
|
2319 |
||
2320 |
if (!ret) { |
|
2321 |
fprintf(stderr, |
|
2322 |
"InnoDB: Cannot create or open"
|
|
2323 |
" archive log file %s.\n" |
|
2324 |
"InnoDB: Cannot continue operation.\n" |
|
2325 |
"InnoDB: Check that the log archive"
|
|
2326 |
" directory exists,\n" |
|
2327 |
"InnoDB: you have access rights to it, and\n" |
|
2328 |
"InnoDB: there is space available.\n", name); |
|
2329 |
exit(1); |
|
2330 |
}
|
|
2331 |
||
2332 |
#ifdef UNIV_DEBUG
|
|
2333 |
if (log_debug_writes) { |
|
2334 |
fprintf(stderr, "Created archive file %s\n", name); |
|
2335 |
}
|
|
2336 |
#endif /* UNIV_DEBUG */ |
|
2337 |
||
2338 |
ret = os_file_close(file_handle); |
|
2339 |
||
2340 |
ut_a(ret); |
|
2341 |
||
2342 |
/* Add the archive file as a node to the space */
|
|
2343 |
||
2344 |
fil_node_create(name, group->file_size / UNIV_PAGE_SIZE, |
|
2345 |
group->archive_space_id, FALSE); |
|
2346 |
||
2347 |
if (next_offset % group->file_size == 0) { |
|
2348 |
log_group_archive_file_header_write( |
|
2349 |
group, n_files, |
|
2350 |
group->archived_file_no + n_files, |
|
2351 |
start_lsn); |
|
2352 |
||
2353 |
next_offset += LOG_FILE_HDR_SIZE; |
|
2354 |
}
|
|
2355 |
}
|
|
2356 |
||
2357 |
len = ut_dulint_minus(end_lsn, start_lsn); |
|
2358 |
||
2359 |
if (group->file_size < (next_offset % group->file_size) + len) { |
|
2360 |
||
2361 |
len = group->file_size - (next_offset % group->file_size); |
|
2362 |
}
|
|
2363 |
||
2364 |
#ifdef UNIV_DEBUG
|
|
2365 |
if (log_debug_writes) { |
|
2366 |
fprintf(stderr, |
|
2367 |
"Archiving starting at lsn %lu %lu, len %lu"
|
|
2368 |
" to group %lu\n", |
|
2369 |
(ulong) ut_dulint_get_high(start_lsn), |
|
2370 |
(ulong) ut_dulint_get_low(start_lsn), |
|
2371 |
(ulong) len, (ulong) group->id); |
|
2372 |
}
|
|
2373 |
#endif /* UNIV_DEBUG */ |
|
2374 |
||
2375 |
log_sys->n_pending_archive_ios++; |
|
2376 |
||
2377 |
log_sys->n_log_ios++; |
|
2378 |
||
2379 |
fil_io(OS_FILE_WRITE | OS_FILE_LOG, FALSE, group->archive_space_id, |
|
2380 |
next_offset / UNIV_PAGE_SIZE, next_offset % UNIV_PAGE_SIZE, |
|
2381 |
ut_calc_align(len, OS_FILE_LOG_BLOCK_SIZE), buf, |
|
2382 |
&log_archive_io); |
|
2383 |
||
2384 |
start_lsn = ut_dulint_add(start_lsn, len); |
|
2385 |
next_offset += len; |
|
2386 |
buf += len; |
|
2387 |
||
2388 |
if (next_offset % group->file_size == 0) { |
|
2389 |
n_files++; |
|
2390 |
}
|
|
2391 |
||
2392 |
if (ut_dulint_cmp(end_lsn, start_lsn) != 0) { |
|
2393 |
||
2394 |
goto loop; |
|
2395 |
}
|
|
2396 |
||
2397 |
group->next_archived_file_no = group->archived_file_no + n_files; |
|
2398 |
group->next_archived_offset = next_offset % group->file_size; |
|
2399 |
||
2400 |
ut_a(group->next_archived_offset % OS_FILE_LOG_BLOCK_SIZE == 0); |
|
2401 |
}
|
|
2402 |
||
2403 |
/*********************************************************
|
|
2404 |
(Writes to the archive of each log group.) Currently, only the first
|
|
2405 |
group is archived. */
|
|
2406 |
static
|
|
2407 |
void
|
|
2408 |
log_archive_groups(void) |
|
2409 |
/*====================*/
|
|
2410 |
{
|
|
2411 |
log_group_t* group; |
|
2412 |
||
2413 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
2414 |
||
2415 |
group = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
2416 |
||
2417 |
log_group_archive(group); |
|
2418 |
}
|
|
2419 |
||
2420 |
/*********************************************************
|
|
2421 |
Completes the archiving write phase for (each log group), currently,
|
|
2422 |
the first log group. */
|
|
2423 |
static
|
|
2424 |
void
|
|
2425 |
log_archive_write_complete_groups(void) |
|
2426 |
/*===================================*/
|
|
2427 |
{
|
|
2428 |
log_group_t* group; |
|
2429 |
ulint end_offset; |
|
2430 |
ulint trunc_files; |
|
2431 |
ulint n_files; |
|
2432 |
dulint start_lsn; |
|
2433 |
dulint end_lsn; |
|
2434 |
ulint i; |
|
2435 |
||
2436 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
2437 |
||
2438 |
group = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
2439 |
||
2440 |
group->archived_file_no = group->next_archived_file_no; |
|
2441 |
group->archived_offset = group->next_archived_offset; |
|
2442 |
||
2443 |
/* Truncate from the archive file space all but the last
|
|
2444 |
file, or if it has been written full, all files */
|
|
2445 |
||
2446 |
n_files = (UNIV_PAGE_SIZE |
|
2447 |
* fil_space_get_size(group->archive_space_id)) |
|
2448 |
/ group->file_size; |
|
2449 |
ut_ad(n_files > 0); |
|
2450 |
||
2451 |
end_offset = group->archived_offset; |
|
2452 |
||
2453 |
if (end_offset % group->file_size == 0) { |
|
2454 |
||
2455 |
trunc_files = n_files; |
|
2456 |
} else { |
|
2457 |
trunc_files = n_files - 1; |
|
2458 |
}
|
|
2459 |
||
2460 |
#ifdef UNIV_DEBUG
|
|
2461 |
if (log_debug_writes && trunc_files) { |
|
2462 |
fprintf(stderr, |
|
2463 |
"Complete file(s) archived to group %lu\n", |
|
2464 |
(ulong) group->id); |
|
2465 |
}
|
|
2466 |
#endif /* UNIV_DEBUG */ |
|
2467 |
||
2468 |
/* Calculate the archive file space start lsn */
|
|
2469 |
start_lsn = ut_dulint_subtract( |
|
2470 |
log_sys->next_archived_lsn, |
|
2471 |
end_offset - LOG_FILE_HDR_SIZE + trunc_files |
|
2472 |
* (group->file_size - LOG_FILE_HDR_SIZE)); |
|
2473 |
end_lsn = start_lsn; |
|
2474 |
||
2475 |
for (i = 0; i < trunc_files; i++) { |
|
2476 |
||
2477 |
end_lsn = ut_dulint_add(end_lsn, |
|
2478 |
group->file_size - LOG_FILE_HDR_SIZE); |
|
2479 |
||
2480 |
/* Write a notice to the headers of archived log
|
|
2481 |
files that the file write has been completed */
|
|
2482 |
||
2483 |
log_group_archive_completed_header_write(group, i, end_lsn); |
|
2484 |
}
|
|
2485 |
||
2486 |
fil_space_truncate_start(group->archive_space_id, |
|
2487 |
trunc_files * group->file_size); |
|
2488 |
||
2489 |
#ifdef UNIV_DEBUG
|
|
2490 |
if (log_debug_writes) { |
|
2491 |
fputs("Archiving writes completed\n", stderr); |
|
2492 |
}
|
|
2493 |
#endif /* UNIV_DEBUG */ |
|
2494 |
}
|
|
2495 |
||
2496 |
/**********************************************************
|
|
2497 |
Completes an archiving i/o. */
|
|
2498 |
static
|
|
2499 |
void
|
|
2500 |
log_archive_check_completion_low(void) |
|
2501 |
/*==================================*/
|
|
2502 |
{
|
|
2503 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
2504 |
||
2505 |
if (log_sys->n_pending_archive_ios == 0 |
|
2506 |
&& log_sys->archiving_phase == LOG_ARCHIVE_READ) { |
|
2507 |
||
2508 |
#ifdef UNIV_DEBUG
|
|
2509 |
if (log_debug_writes) { |
|
2510 |
fputs("Archiving read completed\n", stderr); |
|
2511 |
}
|
|
2512 |
#endif /* UNIV_DEBUG */ |
|
2513 |
||
2514 |
/* Archive buffer has now been read in: start archive writes */
|
|
2515 |
||
2516 |
log_sys->archiving_phase = LOG_ARCHIVE_WRITE; |
|
2517 |
||
2518 |
log_archive_groups(); |
|
2519 |
}
|
|
2520 |
||
2521 |
if (log_sys->n_pending_archive_ios == 0 |
|
2522 |
&& log_sys->archiving_phase == LOG_ARCHIVE_WRITE) { |
|
2523 |
||
2524 |
log_archive_write_complete_groups(); |
|
2525 |
||
2526 |
log_sys->archived_lsn = log_sys->next_archived_lsn; |
|
2527 |
||
2528 |
rw_lock_x_unlock_gen(&(log_sys->archive_lock), LOG_ARCHIVE); |
|
2529 |
}
|
|
2530 |
}
|
|
2531 |
||
2532 |
/**********************************************************
|
|
2533 |
Completes an archiving i/o. */
|
|
2534 |
static
|
|
2535 |
void
|
|
2536 |
log_io_complete_archive(void) |
|
2537 |
/*=========================*/
|
|
2538 |
{
|
|
2539 |
log_group_t* group; |
|
2540 |
||
2541 |
mutex_enter(&(log_sys->mutex)); |
|
2542 |
||
2543 |
group = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
2544 |
||
2545 |
mutex_exit(&(log_sys->mutex)); |
|
2546 |
||
2547 |
fil_flush(group->archive_space_id); |
|
2548 |
||
2549 |
mutex_enter(&(log_sys->mutex)); |
|
2550 |
||
2551 |
ut_ad(log_sys->n_pending_archive_ios > 0); |
|
2552 |
||
2553 |
log_sys->n_pending_archive_ios--; |
|
2554 |
||
2555 |
log_archive_check_completion_low(); |
|
2556 |
||
2557 |
mutex_exit(&(log_sys->mutex)); |
|
2558 |
}
|
|
2559 |
||
2560 |
/************************************************************************
|
|
2561 |
Starts an archiving operation. */
|
|
2562 |
||
2563 |
ibool
|
|
2564 |
log_archive_do( |
|
2565 |
/*===========*/
|
|
2566 |
/* out: TRUE if succeed, FALSE if an archiving
|
|
2567 |
operation was already running */
|
|
2568 |
ibool sync, /* in: TRUE if synchronous operation is desired */ |
|
2569 |
ulint* n_bytes)/* out: archive log buffer size, 0 if nothing to |
|
2570 |
archive */
|
|
2571 |
{
|
|
2572 |
ibool calc_new_limit; |
|
2573 |
dulint start_lsn; |
|
2574 |
dulint limit_lsn; |
|
2575 |
||
2576 |
calc_new_limit = TRUE; |
|
2577 |
loop: |
|
2578 |
mutex_enter(&(log_sys->mutex)); |
|
2579 |
||
2580 |
if (log_sys->archiving_state == LOG_ARCH_OFF) { |
|
2581 |
mutex_exit(&(log_sys->mutex)); |
|
2582 |
||
2583 |
*n_bytes = 0; |
|
2584 |
||
2585 |
return(TRUE); |
|
2586 |
||
2587 |
} else if (log_sys->archiving_state == LOG_ARCH_STOPPED |
|
2588 |
|| log_sys->archiving_state == LOG_ARCH_STOPPING2) { |
|
2589 |
||
2590 |
mutex_exit(&(log_sys->mutex)); |
|
2591 |
||
2592 |
os_event_wait(log_sys->archiving_on); |
|
2593 |
||
2594 |
mutex_enter(&(log_sys->mutex)); |
|
2595 |
||
2596 |
goto loop; |
|
2597 |
}
|
|
2598 |
||
2599 |
start_lsn = log_sys->archived_lsn; |
|
2600 |
||
2601 |
if (calc_new_limit) { |
|
2602 |
ut_a(log_sys->archive_buf_size % OS_FILE_LOG_BLOCK_SIZE == 0); |
|
2603 |
limit_lsn = ut_dulint_add(start_lsn, |
|
2604 |
log_sys->archive_buf_size); |
|
2605 |
||
2606 |
*n_bytes = log_sys->archive_buf_size; |
|
2607 |
||
2608 |
if (ut_dulint_cmp(limit_lsn, log_sys->lsn) >= 0) { |
|
2609 |
||
2610 |
limit_lsn = ut_dulint_align_down( |
|
2611 |
log_sys->lsn, OS_FILE_LOG_BLOCK_SIZE); |
|
2612 |
}
|
|
2613 |
}
|
|
2614 |
||
2615 |
if (ut_dulint_cmp(log_sys->archived_lsn, limit_lsn) >= 0) { |
|
2616 |
||
2617 |
mutex_exit(&(log_sys->mutex)); |
|
2618 |
||
2619 |
*n_bytes = 0; |
|
2620 |
||
2621 |
return(TRUE); |
|
2622 |
}
|
|
2623 |
||
2624 |
if (ut_dulint_cmp(log_sys->written_to_all_lsn, limit_lsn) < 0) { |
|
2625 |
||
2626 |
mutex_exit(&(log_sys->mutex)); |
|
2627 |
||
2628 |
log_write_up_to(limit_lsn, LOG_WAIT_ALL_GROUPS, TRUE); |
|
2629 |
||
2630 |
calc_new_limit = FALSE; |
|
2631 |
||
2632 |
goto loop; |
|
2633 |
}
|
|
2634 |
||
2635 |
if (log_sys->n_pending_archive_ios > 0) { |
|
2636 |
/* An archiving operation is running */
|
|
2637 |
||
2638 |
mutex_exit(&(log_sys->mutex)); |
|
2639 |
||
2640 |
if (sync) { |
|
2641 |
rw_lock_s_lock(&(log_sys->archive_lock)); |
|
2642 |
rw_lock_s_unlock(&(log_sys->archive_lock)); |
|
2643 |
}
|
|
2644 |
||
2645 |
*n_bytes = log_sys->archive_buf_size; |
|
2646 |
||
2647 |
return(FALSE); |
|
2648 |
}
|
|
2649 |
||
2650 |
rw_lock_x_lock_gen(&(log_sys->archive_lock), LOG_ARCHIVE); |
|
2651 |
||
2652 |
log_sys->archiving_phase = LOG_ARCHIVE_READ; |
|
2653 |
||
2654 |
log_sys->next_archived_lsn = limit_lsn; |
|
2655 |
||
2656 |
#ifdef UNIV_DEBUG
|
|
2657 |
if (log_debug_writes) { |
|
2658 |
fprintf(stderr, |
|
2659 |
"Archiving from lsn %lu %lu to lsn %lu %lu\n", |
|
2660 |
(ulong) ut_dulint_get_high(log_sys->archived_lsn), |
|
2661 |
(ulong) ut_dulint_get_low(log_sys->archived_lsn), |
|
2662 |
(ulong) ut_dulint_get_high(limit_lsn), |
|
2663 |
(ulong) ut_dulint_get_low(limit_lsn)); |
|
2664 |
}
|
|
2665 |
#endif /* UNIV_DEBUG */ |
|
2666 |
||
2667 |
/* Read the log segment to the archive buffer */
|
|
2668 |
||
2669 |
log_group_read_log_seg(LOG_ARCHIVE, log_sys->archive_buf, |
|
2670 |
UT_LIST_GET_FIRST(log_sys->log_groups), |
|
2671 |
start_lsn, limit_lsn); |
|
2672 |
||
2673 |
mutex_exit(&(log_sys->mutex)); |
|
2674 |
||
2675 |
if (sync) { |
|
2676 |
rw_lock_s_lock(&(log_sys->archive_lock)); |
|
2677 |
rw_lock_s_unlock(&(log_sys->archive_lock)); |
|
2678 |
}
|
|
2679 |
||
2680 |
*n_bytes = log_sys->archive_buf_size; |
|
2681 |
||
2682 |
return(TRUE); |
|
2683 |
}
|
|
2684 |
||
2685 |
/********************************************************************
|
|
2686 |
Writes the log contents to the archive at least up to the lsn when this
|
|
2687 |
function was called. */
|
|
2688 |
static
|
|
2689 |
void
|
|
2690 |
log_archive_all(void) |
|
2691 |
/*=================*/
|
|
2692 |
{
|
|
2693 |
dulint present_lsn; |
|
2694 |
ulint dummy; |
|
2695 |
||
2696 |
mutex_enter(&(log_sys->mutex)); |
|
2697 |
||
2698 |
if (log_sys->archiving_state == LOG_ARCH_OFF) { |
|
2699 |
mutex_exit(&(log_sys->mutex)); |
|
2700 |
||
2701 |
return; |
|
2702 |
}
|
|
2703 |
||
2704 |
present_lsn = log_sys->lsn; |
|
2705 |
||
2706 |
mutex_exit(&(log_sys->mutex)); |
|
2707 |
||
2708 |
log_pad_current_log_block(); |
|
2709 |
||
2710 |
for (;;) { |
|
2711 |
mutex_enter(&(log_sys->mutex)); |
|
2712 |
||
2713 |
if (ut_dulint_cmp(present_lsn, log_sys->archived_lsn) <= 0) { |
|
2714 |
||
2715 |
mutex_exit(&(log_sys->mutex)); |
|
2716 |
||
2717 |
return; |
|
2718 |
}
|
|
2719 |
||
2720 |
mutex_exit(&(log_sys->mutex)); |
|
2721 |
||
2722 |
log_archive_do(TRUE, &dummy); |
|
2723 |
}
|
|
2724 |
}
|
|
2725 |
||
2726 |
/*********************************************************
|
|
2727 |
Closes the possible open archive log file (for each group) the first group,
|
|
2728 |
and if it was open, increments the group file count by 2, if desired. */
|
|
2729 |
static
|
|
2730 |
void
|
|
2731 |
log_archive_close_groups( |
|
2732 |
/*=====================*/
|
|
2733 |
ibool increment_file_count) /* in: TRUE if we want to increment |
|
2734 |
the file count */
|
|
2735 |
{
|
|
2736 |
log_group_t* group; |
|
2737 |
ulint trunc_len; |
|
2738 |
||
2739 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
2740 |
||
2741 |
if (log_sys->archiving_state == LOG_ARCH_OFF) { |
|
2742 |
||
2743 |
return; |
|
2744 |
}
|
|
2745 |
||
2746 |
group = UT_LIST_GET_FIRST(log_sys->log_groups); |
|
2747 |
||
2748 |
trunc_len = UNIV_PAGE_SIZE |
|
2749 |
* fil_space_get_size(group->archive_space_id); |
|
2750 |
if (trunc_len > 0) { |
|
2751 |
ut_a(trunc_len == group->file_size); |
|
2752 |
||
2753 |
/* Write a notice to the headers of archived log
|
|
2754 |
files that the file write has been completed */
|
|
2755 |
||
2756 |
log_group_archive_completed_header_write( |
|
2757 |
group, 0, log_sys->archived_lsn); |
|
2758 |
||
2759 |
fil_space_truncate_start(group->archive_space_id, |
|
2760 |
trunc_len); |
|
2761 |
if (increment_file_count) { |
|
2762 |
group->archived_offset = 0; |
|
2763 |
group->archived_file_no += 2; |
|
2764 |
}
|
|
2765 |
||
2766 |
#ifdef UNIV_DEBUG
|
|
2767 |
if (log_debug_writes) { |
|
2768 |
fprintf(stderr, |
|
2769 |
"Incrementing arch file no to %lu"
|
|
2770 |
" in log group %lu\n", |
|
2771 |
(ulong) group->archived_file_no + 2, |
|
2772 |
(ulong) group->id); |
|
2773 |
}
|
|
2774 |
#endif /* UNIV_DEBUG */ |
|
2775 |
}
|
|
2776 |
}
|
|
2777 |
||
2778 |
/********************************************************************
|
|
2779 |
Writes the log contents to the archive up to the lsn when this function was
|
|
2780 |
called, and stops the archiving. When archiving is started again, the archived
|
|
2781 |
log file numbers start from 2 higher, so that the archiving will not write
|
|
2782 |
again to the archived log files which exist when this function returns. */
|
|
2783 |
||
2784 |
ulint
|
|
2785 |
log_archive_stop(void) |
|
2786 |
/*==================*/
|
|
2787 |
/* out: DB_SUCCESS or DB_ERROR */
|
|
2788 |
{
|
|
2789 |
ibool success; |
|
2790 |
||
2791 |
mutex_enter(&(log_sys->mutex)); |
|
2792 |
||
2793 |
if (log_sys->archiving_state != LOG_ARCH_ON) { |
|
2794 |
||
2795 |
mutex_exit(&(log_sys->mutex)); |
|
2796 |
||
2797 |
return(DB_ERROR); |
|
2798 |
}
|
|
2799 |
||
2800 |
log_sys->archiving_state = LOG_ARCH_STOPPING; |
|
2801 |
||
2802 |
mutex_exit(&(log_sys->mutex)); |
|
2803 |
||
2804 |
log_archive_all(); |
|
2805 |
||
2806 |
mutex_enter(&(log_sys->mutex)); |
|
2807 |
||
2808 |
log_sys->archiving_state = LOG_ARCH_STOPPING2; |
|
2809 |
os_event_reset(log_sys->archiving_on); |
|
2810 |
||
2811 |
mutex_exit(&(log_sys->mutex)); |
|
2812 |
||
2813 |
/* Wait for a possible archiving operation to end */
|
|
2814 |
||
2815 |
rw_lock_s_lock(&(log_sys->archive_lock)); |
|
2816 |
rw_lock_s_unlock(&(log_sys->archive_lock)); |
|
2817 |
||
2818 |
mutex_enter(&(log_sys->mutex)); |
|
2819 |
||
2820 |
/* Close all archived log files, incrementing the file count by 2,
|
|
2821 |
if appropriate */
|
|
2822 |
||
2823 |
log_archive_close_groups(TRUE); |
|
2824 |
||
2825 |
mutex_exit(&(log_sys->mutex)); |
|
2826 |
||
2827 |
/* Make a checkpoint, so that if recovery is needed, the file numbers
|
|
2828 |
of new archived log files will start from the right value */
|
|
2829 |
||
2830 |
success = FALSE; |
|
2831 |
||
2832 |
while (!success) { |
|
2833 |
success = log_checkpoint(TRUE, TRUE); |
|
2834 |
}
|
|
2835 |
||
2836 |
mutex_enter(&(log_sys->mutex)); |
|
2837 |
||
2838 |
log_sys->archiving_state = LOG_ARCH_STOPPED; |
|
2839 |
||
2840 |
mutex_exit(&(log_sys->mutex)); |
|
2841 |
||
2842 |
return(DB_SUCCESS); |
|
2843 |
}
|
|
2844 |
||
2845 |
/********************************************************************
|
|
2846 |
Starts again archiving which has been stopped. */
|
|
2847 |
||
2848 |
ulint
|
|
2849 |
log_archive_start(void) |
|
2850 |
/*===================*/
|
|
2851 |
/* out: DB_SUCCESS or DB_ERROR */
|
|
2852 |
{
|
|
2853 |
mutex_enter(&(log_sys->mutex)); |
|
2854 |
||
2855 |
if (log_sys->archiving_state != LOG_ARCH_STOPPED) { |
|
2856 |
||
2857 |
mutex_exit(&(log_sys->mutex)); |
|
2858 |
||
2859 |
return(DB_ERROR); |
|
2860 |
}
|
|
2861 |
||
2862 |
log_sys->archiving_state = LOG_ARCH_ON; |
|
2863 |
||
2864 |
os_event_set(log_sys->archiving_on); |
|
2865 |
||
2866 |
mutex_exit(&(log_sys->mutex)); |
|
2867 |
||
2868 |
return(DB_SUCCESS); |
|
2869 |
}
|
|
2870 |
||
2871 |
/********************************************************************
|
|
2872 |
Stop archiving the log so that a gap may occur in the archived log files. */
|
|
2873 |
||
2874 |
ulint
|
|
2875 |
log_archive_noarchivelog(void) |
|
2876 |
/*==========================*/
|
|
2877 |
/* out: DB_SUCCESS or DB_ERROR */
|
|
2878 |
{
|
|
2879 |
loop: |
|
2880 |
mutex_enter(&(log_sys->mutex)); |
|
2881 |
||
2882 |
if (log_sys->archiving_state == LOG_ARCH_STOPPED |
|
2883 |
|| log_sys->archiving_state == LOG_ARCH_OFF) { |
|
2884 |
||
2885 |
log_sys->archiving_state = LOG_ARCH_OFF; |
|
2886 |
||
2887 |
os_event_set(log_sys->archiving_on); |
|
2888 |
||
2889 |
mutex_exit(&(log_sys->mutex)); |
|
2890 |
||
2891 |
return(DB_SUCCESS); |
|
2892 |
}
|
|
2893 |
||
2894 |
mutex_exit(&(log_sys->mutex)); |
|
2895 |
||
2896 |
log_archive_stop(); |
|
2897 |
||
2898 |
os_thread_sleep(500000); |
|
2899 |
||
2900 |
goto loop; |
|
2901 |
}
|
|
2902 |
||
2903 |
/********************************************************************
|
|
2904 |
Start archiving the log so that a gap may occur in the archived log files. */
|
|
2905 |
||
2906 |
ulint
|
|
2907 |
log_archive_archivelog(void) |
|
2908 |
/*========================*/
|
|
2909 |
/* out: DB_SUCCESS or DB_ERROR */
|
|
2910 |
{
|
|
2911 |
mutex_enter(&(log_sys->mutex)); |
|
2912 |
||
2913 |
if (log_sys->archiving_state == LOG_ARCH_OFF) { |
|
2914 |
||
2915 |
log_sys->archiving_state = LOG_ARCH_ON; |
|
2916 |
||
2917 |
log_sys->archived_lsn |
|
2918 |
= ut_dulint_align_down(log_sys->lsn, |
|
2919 |
OS_FILE_LOG_BLOCK_SIZE); |
|
2920 |
mutex_exit(&(log_sys->mutex)); |
|
2921 |
||
2922 |
return(DB_SUCCESS); |
|
2923 |
}
|
|
2924 |
||
2925 |
mutex_exit(&(log_sys->mutex)); |
|
2926 |
||
2927 |
return(DB_ERROR); |
|
2928 |
}
|
|
2929 |
||
2930 |
/********************************************************************
|
|
2931 |
Tries to establish a big enough margin of free space in the log groups, such
|
|
2932 |
that a new log entry can be catenated without an immediate need for
|
|
2933 |
archiving. */
|
|
2934 |
static
|
|
2935 |
void
|
|
2936 |
log_archive_margin(void) |
|
2937 |
/*====================*/
|
|
2938 |
{
|
|
2939 |
log_t* log = log_sys; |
|
2940 |
ulint age; |
|
2941 |
ibool sync; |
|
2942 |
ulint dummy; |
|
2943 |
loop: |
|
2944 |
mutex_enter(&(log->mutex)); |
|
2945 |
||
2946 |
if (log->archiving_state == LOG_ARCH_OFF) { |
|
2947 |
mutex_exit(&(log->mutex)); |
|
2948 |
||
2949 |
return; |
|
2950 |
}
|
|
2951 |
||
2952 |
age = ut_dulint_minus(log->lsn, log->archived_lsn); |
|
2953 |
||
2954 |
if (age > log->max_archived_lsn_age) { |
|
2955 |
||
2956 |
/* An archiving is urgent: we have to do synchronous i/o */
|
|
2957 |
||
2958 |
sync = TRUE; |
|
2959 |
||
2960 |
} else if (age > log->max_archived_lsn_age_async) { |
|
2961 |
||
2962 |
/* An archiving is not urgent: we do asynchronous i/o */
|
|
2963 |
||
2964 |
sync = FALSE; |
|
2965 |
} else { |
|
2966 |
/* No archiving required yet */
|
|
2967 |
||
2968 |
mutex_exit(&(log->mutex)); |
|
2969 |
||
2970 |
return; |
|
2971 |
}
|
|
2972 |
||
2973 |
mutex_exit(&(log->mutex)); |
|
2974 |
||
2975 |
log_archive_do(sync, &dummy); |
|
2976 |
||
2977 |
if (sync == TRUE) { |
|
2978 |
/* Check again that enough was written to the archive */
|
|
2979 |
||
2980 |
goto loop; |
|
2981 |
}
|
|
2982 |
}
|
|
2983 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
2984 |
||
2985 |
/************************************************************************
|
|
2986 |
Checks that there is enough free space in the log to start a new query step.
|
|
2987 |
Flushes the log buffer or makes a new checkpoint if necessary. NOTE: this
|
|
2988 |
function may only be called if the calling thread owns no synchronization
|
|
2989 |
objects! */
|
|
2990 |
||
2991 |
void
|
|
2992 |
log_check_margins(void) |
|
2993 |
/*===================*/
|
|
2994 |
{
|
|
2995 |
loop: |
|
2996 |
log_flush_margin(); |
|
2997 |
||
2998 |
log_checkpoint_margin(); |
|
2999 |
||
3000 |
#ifdef UNIV_LOG_ARCHIVE
|
|
3001 |
log_archive_margin(); |
|
3002 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
3003 |
||
3004 |
mutex_enter(&(log_sys->mutex)); |
|
3005 |
||
3006 |
if (log_sys->check_flush_or_checkpoint) { |
|
3007 |
||
3008 |
mutex_exit(&(log_sys->mutex)); |
|
3009 |
||
3010 |
goto loop; |
|
3011 |
}
|
|
3012 |
||
3013 |
mutex_exit(&(log_sys->mutex)); |
|
3014 |
}
|
|
3015 |
||
3016 |
/********************************************************************
|
|
3017 |
Makes a checkpoint at the latest lsn and writes it to first page of each
|
|
3018 |
data file in the database, so that we know that the file spaces contain
|
|
3019 |
all modifications up to that lsn. This can only be called at database
|
|
3020 |
shutdown. This function also writes all log in log files to the log archive. */
|
|
3021 |
||
3022 |
void
|
|
3023 |
logs_empty_and_mark_files_at_shutdown(void) |
|
3024 |
/*=======================================*/
|
|
3025 |
{
|
|
3026 |
dulint lsn; |
|
3027 |
ulint arch_log_no; |
|
3028 |
||
3029 |
if (srv_print_verbose_log) { |
|
3030 |
ut_print_timestamp(stderr); |
|
3031 |
fprintf(stderr, " InnoDB: Starting shutdown...\n"); |
|
3032 |
}
|
|
3033 |
/* Wait until the master thread and all other operations are idle: our
|
|
3034 |
algorithm only works if the server is idle at shutdown */
|
|
3035 |
||
3036 |
srv_shutdown_state = SRV_SHUTDOWN_CLEANUP; |
|
3037 |
loop: |
|
3038 |
os_thread_sleep(100000); |
|
3039 |
||
3040 |
mutex_enter(&kernel_mutex); |
|
3041 |
||
3042 |
/* We need the monitor threads to stop before we proceed with a
|
|
3043 |
normal shutdown. In case of very fast shutdown, however, we can
|
|
3044 |
proceed without waiting for monitor threads. */
|
|
3045 |
||
3046 |
if (srv_fast_shutdown < 2 |
|
3047 |
&& (srv_error_monitor_active |
|
3048 |
|| srv_lock_timeout_and_monitor_active)) { |
|
3049 |
||
3050 |
mutex_exit(&kernel_mutex); |
|
3051 |
||
3052 |
goto loop; |
|
3053 |
}
|
|
3054 |
||
3055 |
/* Check that there are no longer transactions. We need this wait even
|
|
3056 |
for the 'very fast' shutdown, because the InnoDB layer may have
|
|
3057 |
committed or prepared transactions and we don't want to lose them. */
|
|
3058 |
||
3059 |
if (trx_n_mysql_transactions > 0 |
|
3060 |
|| UT_LIST_GET_LEN(trx_sys->trx_list) > 0) { |
|
3061 |
||
3062 |
mutex_exit(&kernel_mutex); |
|
3063 |
||
3064 |
goto loop; |
|
3065 |
}
|
|
3066 |
||
3067 |
if (srv_fast_shutdown == 2) { |
|
3068 |
/* In this fastest shutdown we do not flush the buffer pool:
|
|
3069 |
it is essentially a 'crash' of the InnoDB server. Make sure
|
|
3070 |
that the log is all flushed to disk, so that we can recover
|
|
3071 |
all committed transactions in a crash recovery. We must not
|
|
3072 |
write the lsn stamps to the data files, since at a startup
|
|
3073 |
InnoDB deduces from the stamps if the previous shutdown was
|
|
3074 |
clean. */
|
|
3075 |
||
3076 |
log_buffer_flush_to_disk(); |
|
3077 |
||
3078 |
return; /* We SKIP ALL THE REST !! */ |
|
3079 |
}
|
|
3080 |
||
3081 |
/* Check that the master thread is suspended */
|
|
3082 |
||
3083 |
if (srv_n_threads_active[SRV_MASTER] != 0) { |
|
3084 |
||
3085 |
mutex_exit(&kernel_mutex); |
|
3086 |
||
3087 |
goto loop; |
|
3088 |
}
|
|
3089 |
||
3090 |
mutex_exit(&kernel_mutex); |
|
3091 |
||
3092 |
mutex_enter(&(log_sys->mutex)); |
|
3093 |
||
3094 |
if (log_sys->n_pending_checkpoint_writes |
|
3095 |
#ifdef UNIV_LOG_ARCHIVE
|
|
3096 |
|| log_sys->n_pending_archive_ios |
|
3097 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
3098 |
|| log_sys->n_pending_writes) { |
|
3099 |
||
3100 |
mutex_exit(&(log_sys->mutex)); |
|
3101 |
||
3102 |
goto loop; |
|
3103 |
}
|
|
3104 |
||
3105 |
mutex_exit(&(log_sys->mutex)); |
|
3106 |
||
3107 |
if (!buf_pool_check_no_pending_io()) { |
|
3108 |
||
3109 |
goto loop; |
|
3110 |
}
|
|
3111 |
||
3112 |
#ifdef UNIV_LOG_ARCHIVE
|
|
3113 |
log_archive_all(); |
|
3114 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
3115 |
||
3116 |
log_make_checkpoint_at(ut_dulint_max, TRUE); |
|
3117 |
||
3118 |
mutex_enter(&(log_sys->mutex)); |
|
3119 |
||
3120 |
lsn = log_sys->lsn; |
|
3121 |
||
3122 |
if ((ut_dulint_cmp(lsn, log_sys->last_checkpoint_lsn) != 0) |
|
3123 |
#ifdef UNIV_LOG_ARCHIVE
|
|
3124 |
|| (srv_log_archive_on |
|
3125 |
&& ut_dulint_cmp(lsn, |
|
3126 |
ut_dulint_add(log_sys->archived_lsn, |
|
3127 |
LOG_BLOCK_HDR_SIZE)) |
|
3128 |
!= 0) |
|
3129 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
3130 |
) { |
|
3131 |
||
3132 |
mutex_exit(&(log_sys->mutex)); |
|
3133 |
||
3134 |
goto loop; |
|
3135 |
}
|
|
3136 |
||
3137 |
arch_log_no = 0; |
|
3138 |
||
3139 |
#ifdef UNIV_LOG_ARCHIVE
|
|
3140 |
UT_LIST_GET_FIRST(log_sys->log_groups)->archived_file_no; |
|
3141 |
||
3142 |
if (0 == UT_LIST_GET_FIRST(log_sys->log_groups)->archived_offset) { |
|
3143 |
||
3144 |
arch_log_no--; |
|
3145 |
}
|
|
3146 |
||
3147 |
log_archive_close_groups(TRUE); |
|
3148 |
#endif /* UNIV_LOG_ARCHIVE */ |
|
3149 |
||
3150 |
mutex_exit(&(log_sys->mutex)); |
|
3151 |
||
3152 |
mutex_enter(&kernel_mutex); |
|
3153 |
/* Check that the master thread has stayed suspended */
|
|
3154 |
if (srv_n_threads_active[SRV_MASTER] != 0) { |
|
3155 |
fprintf(stderr, |
|
3156 |
"InnoDB: Warning: the master thread woke up"
|
|
3157 |
" during shutdown\n"); |
|
3158 |
||
3159 |
mutex_exit(&kernel_mutex); |
|
3160 |
||
3161 |
goto loop; |
|
3162 |
}
|
|
3163 |
mutex_exit(&kernel_mutex); |
|
3164 |
||
3165 |
fil_flush_file_spaces(FIL_TABLESPACE); |
|
3166 |
fil_flush_file_spaces(FIL_LOG); |
|
3167 |
||
3168 |
/* The call fil_write_flushed_lsn_to_data_files() will pass the buffer
|
|
3169 |
pool: therefore it is essential that the buffer pool has been
|
|
3170 |
completely flushed to disk! (We do not call fil_write... if the
|
|
3171 |
'very fast' shutdown is enabled.) */
|
|
3172 |
||
3173 |
if (!buf_all_freed()) { |
|
3174 |
||
3175 |
goto loop; |
|
3176 |
}
|
|
3177 |
||
3178 |
srv_shutdown_state = SRV_SHUTDOWN_LAST_PHASE; |
|
3179 |
||
3180 |
/* Make some checks that the server really is quiet */
|
|
3181 |
ut_a(srv_n_threads_active[SRV_MASTER] == 0); |
|
3182 |
ut_a(buf_all_freed()); |
|
3183 |
ut_a(0 == ut_dulint_cmp(lsn, log_sys->lsn)); |
|
3184 |
||
3185 |
if (ut_dulint_cmp(lsn, srv_start_lsn) < 0) { |
|
3186 |
fprintf(stderr, |
|
3187 |
"InnoDB: Error: log sequence number"
|
|
3188 |
" at shutdown %lu %lu\n" |
|
3189 |
"InnoDB: is lower than at startup %lu %lu!\n", |
|
3190 |
(ulong) ut_dulint_get_high(lsn), |
|
3191 |
(ulong) ut_dulint_get_low(lsn), |
|
3192 |
(ulong) ut_dulint_get_high(srv_start_lsn), |
|
3193 |
(ulong) ut_dulint_get_low(srv_start_lsn)); |
|
3194 |
}
|
|
3195 |
||
3196 |
srv_shutdown_lsn = lsn; |
|
3197 |
||
3198 |
fil_write_flushed_lsn_to_data_files(lsn, arch_log_no); |
|
3199 |
||
3200 |
fil_flush_file_spaces(FIL_TABLESPACE); |
|
3201 |
||
3202 |
fil_close_all_files(); |
|
3203 |
||
3204 |
/* Make some checks that the server really is quiet */
|
|
3205 |
ut_a(srv_n_threads_active[SRV_MASTER] == 0); |
|
3206 |
ut_a(buf_all_freed()); |
|
3207 |
ut_a(0 == ut_dulint_cmp(lsn, log_sys->lsn)); |
|
3208 |
}
|
|
3209 |
||
3210 |
/**********************************************************
|
|
3211 |
Checks by parsing that the catenated log segment for a single mtr is
|
|
3212 |
consistent. */
|
|
3213 |
||
3214 |
ibool
|
|
3215 |
log_check_log_recs( |
|
3216 |
/*===============*/
|
|
3217 |
byte* buf, /* in: pointer to the start of the log segment |
|
3218 |
in the log_sys->buf log buffer */
|
|
3219 |
ulint len, /* in: segment length in bytes */ |
|
3220 |
dulint buf_start_lsn) /* in: buffer start lsn */ |
|
3221 |
{
|
|
3222 |
dulint contiguous_lsn; |
|
3223 |
dulint scanned_lsn; |
|
3224 |
byte* start; |
|
3225 |
byte* end; |
|
3226 |
byte* buf1; |
|
3227 |
byte* scan_buf; |
|
3228 |
||
3229 |
ut_ad(mutex_own(&(log_sys->mutex))); |
|
3230 |
||
3231 |
if (len == 0) { |
|
3232 |
||
3233 |
return(TRUE); |
|
3234 |
}
|
|
3235 |
||
3236 |
start = ut_align_down(buf, OS_FILE_LOG_BLOCK_SIZE); |
|
3237 |
end = ut_align(buf + len, OS_FILE_LOG_BLOCK_SIZE); |
|
3238 |
||
3239 |
buf1 = mem_alloc((end - start) + OS_FILE_LOG_BLOCK_SIZE); |
|
3240 |
scan_buf = ut_align(buf1, OS_FILE_LOG_BLOCK_SIZE); |
|
3241 |
||
3242 |
ut_memcpy(scan_buf, start, end - start); |
|
3243 |
||
3244 |
recv_scan_log_recs(TRUE, |
|
3245 |
(buf_pool->n_frames |
|
3246 |
- recv_n_pool_free_frames) * UNIV_PAGE_SIZE, |
|
3247 |
FALSE, scan_buf, end - start, |
|
3248 |
ut_dulint_align_down(buf_start_lsn, |
|
3249 |
OS_FILE_LOG_BLOCK_SIZE), |
|
3250 |
&contiguous_lsn, &scanned_lsn); |
|
3251 |
||
3252 |
ut_a(ut_dulint_cmp(scanned_lsn, ut_dulint_add(buf_start_lsn, len)) |
|
3253 |
== 0); |
|
3254 |
ut_a(ut_dulint_cmp(recv_sys->recovered_lsn, scanned_lsn) == 0); |
|
3255 |
||
3256 |
mem_free(buf1); |
|
3257 |
||
3258 |
return(TRUE); |
|
3259 |
}
|
|
3260 |
||
3261 |
/**********************************************************
|
|
3262 |
Peeks the current lsn. */
|
|
3263 |
||
3264 |
ibool
|
|
3265 |
log_peek_lsn( |
|
3266 |
/*=========*/
|
|
3267 |
/* out: TRUE if success, FALSE if could not get the
|
|
3268 |
log system mutex */
|
|
3269 |
dulint* lsn) /* out: if returns TRUE, current lsn is here */ |
|
3270 |
{
|
|
3271 |
if (0 == mutex_enter_nowait(&(log_sys->mutex))) { |
|
3272 |
*lsn = log_sys->lsn; |
|
3273 |
||
3274 |
mutex_exit(&(log_sys->mutex)); |
|
3275 |
||
3276 |
return(TRUE); |
|
3277 |
}
|
|
3278 |
||
3279 |
return(FALSE); |
|
3280 |
}
|
|
3281 |
||
3282 |
/**********************************************************
|
|
3283 |
Prints info of the log. */
|
|
3284 |
||
3285 |
void
|
|
3286 |
log_print( |
|
3287 |
/*======*/
|
|
3288 |
FILE* file) /* in: file where to print */ |
|
3289 |
{
|
|
3290 |
double time_elapsed; |
|
3291 |
time_t current_time; |
|
3292 |
||
3293 |
mutex_enter(&(log_sys->mutex)); |
|
3294 |
||
3295 |
fprintf(file, |
|
3296 |
"Log sequence number %lu %lu\n" |
|
3297 |
"Log flushed up to %lu %lu\n" |
|
3298 |
"Last checkpoint at %lu %lu\n", |
|
3299 |
(ulong) ut_dulint_get_high(log_sys->lsn), |
|
3300 |
(ulong) ut_dulint_get_low(log_sys->lsn), |
|
3301 |
(ulong) ut_dulint_get_high(log_sys->flushed_to_disk_lsn), |
|
3302 |
(ulong) ut_dulint_get_low(log_sys->flushed_to_disk_lsn), |
|
3303 |
(ulong) ut_dulint_get_high(log_sys->last_checkpoint_lsn), |
|
3304 |
(ulong) ut_dulint_get_low(log_sys->last_checkpoint_lsn)); |
|
3305 |
||
3306 |
current_time = time(NULL); |
|
3307 |
||
3308 |
time_elapsed = 0.001 + difftime(current_time, |
|
3309 |
log_sys->last_printout_time); |
|
3310 |
fprintf(file, |
|
3311 |
"%lu pending log writes, %lu pending chkp writes\n" |
|
3312 |
"%lu log i/o's done, %.2f log i/o's/second\n", |
|
3313 |
(ulong) log_sys->n_pending_writes, |
|
3314 |
(ulong) log_sys->n_pending_checkpoint_writes, |
|
3315 |
(ulong) log_sys->n_log_ios, |
|
3316 |
((log_sys->n_log_ios - log_sys->n_log_ios_old) |
|
3317 |
/ time_elapsed)); |
|
3318 |
||
3319 |
log_sys->n_log_ios_old = log_sys->n_log_ios; |
|
3320 |
log_sys->last_printout_time = current_time; |
|
3321 |
||
3322 |
mutex_exit(&(log_sys->mutex)); |
|
3323 |
}
|
|
3324 |
||
3325 |
/**************************************************************************
|
|
3326 |
Refreshes the statistics used to print per-second averages. */
|
|
3327 |
||
3328 |
void
|
|
3329 |
log_refresh_stats(void) |
|
3330 |
/*===================*/
|
|
3331 |
{
|
|
3332 |
log_sys->n_log_ios_old = log_sys->n_log_ios; |
|
3333 |
log_sys->last_printout_time = time(NULL); |
|
3334 |
}
|