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The build checkout directory is a directory on the TeamCity agent machine where all of the sources of all builds are checked out into. If you use the agent-side checkout mode, the build agent checks out the sources into this directory before the build. In case you use the server-side checkout mode, the TeamCity server sends  incremental patches to the agent to update only the files changed since the last build in the given checkout directory; with the Do not check out files automatically mode, no sources will be checked out , but with all modes and the directory will not be cleaned if not used as described below.


See the Free disk space build feature to ensure the build gets enough disk free space on the build agent by cleaning the checkout directory automatically.

Note: with the Do not check out files automatically mode, no sources will be checked out and the directory will not be cleaned automatically if not used.

See also:


Administrator's Guide: Configuring VCS Settings