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List:       lustre-discuss
Subject:    [lustre-discuss] cache management of Lustre
From:       oleg.drokin () intel ! com (Drokin, Oleg)
Date:       2015-10-18 23:00:47
Message-ID: 6CE3BB92-B107-4D07-AF83-1039ECE0A281 () intel ! com
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Hello!

On Oct 17, 2015, at 9:49 PM, teng wang wrote:

> Can anyone tell me how Lustre client and server mange the cache?
> Or is there any related resource?

Server-side the cache is just straight VFS cache with usual controls
(though on OSTs you also get to exclude certain filesizes out).

On client it's also straight VFS cache, but there Lustre locks
play an important role in keeping those caches consistent.
There is an old Lustre Internals book by ORNL that contains a lot
of good info, though a bit stale at places. None the less all
the concepts remained the same and in particular all locking
interactions are still current.
http://users.nccs.gov/~fwang2/papers/lustre_report.pdf

Hope that helps.

Bye,
    Oleg


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