~azzar1/unity/add-show-desktop-key

Document the master vs. slave distinction.

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Master versus slave servers

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IVLE is normally deployed in a cluster of several machines, split into

two different roles: master and slave.

There must be exactly one master server per cluster. The master normally

runs the PostgreSQL database server, the Subversion server, and the IVLE User

Management Server (``ivle-usrmgt-server``). It might also export shared data

directories to the slaves over NFS.

There may be any number of slaves in a cluster. They run the IVLE web

application, which also starts console host processes. Each slave makes use

of the shared services on the master.

For a small instance a slave may be run on the same machine as the master.

This is the setup described on this page.

Installing from a Debian package

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