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document that multiple clients can backup to a single remote #156

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2676c5f
document that multiple clients can backup to a single remote
anarcat Dec 16, 2014
effab97
clarify that simultaneous backups may be a problem
anarcat Mar 5, 2015
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13 changes: 13 additions & 0 deletions docs/faq.rst
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Expand Up @@ -12,6 +12,19 @@ Can I backup VM disk images?
Yes, the :ref:`deduplication <deduplication_def>` technique used by |project_name|
makes sure only the modified parts of the file are stored.

Can I backup from multiple servers into a single repository?
Yes, but in order for the deduplication used by Attic to work, it
needs to keep a local cache containing checksums of all file
chunks already stored in the repository. This cache is stored in
``~/.cache/attic/``. If Attic detects that a repository has been
modified since the local cache was updated it will need to rebuild
the cache. This rebuild can be quite time consuming.

So, yes it's possible. But it will be most efficient if a single
repository is only modified from one place. Also keep in mind that
Attic will keep an exclusive lock on the repository while creating
or deleting archives, which may make *simultaneous* backups fail.

Which file attributes are preserved?
The following attributes are preserved:

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