restic/doc/cache.rst

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***********
Local Cache
***********
In order to speed up certain operations, restic manages a local cache of data.
The location of the cache directory depends on the operating system and the
environment; see :ref:`caching`.
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Each repository has its own cache sub-directory, consisting of the repository ID
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which is chosen at ``init``. All cache directories for different repositories are
independent of each other.
Snapshots, Data and Indexes
===========================
Snapshot, Data and Index files are cached in the sub-directories ``snapshots``,
``data`` and ``index``, as read from the repository.
Expiry
======
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Whenever a cache directory for a repository is used, that directory's modification
timestamp is updated to the current time. By looking at the modification
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timestamps of the repository cache directories it is easy to decide which directories
are old and haven't been used in a long time. Those are probably stale and can
be removed.