[Lustre-discuss] a basic question for lustre
Andreas Dilger
adilger at Sun.COM
Sun May 31 20:56:00 PDT 2009
On May 28, 2009 23:13 +0800, 巍 搪 wrote:
> I'm so happy to join in this forum to solve my
> question ,I'd like to know what is the unit which the lustre client
> cache the file data, a file or a block or a object? or it still only
> use the vfs buffer cache mechanism?
While Lustre itself has byte-range locking, the Linux kernel will
only practically allow caching at the page level. The client can
also send uncached writes and the server will do byte-range locking.
> And I want to some materials about the lustre cache include the
> mds cache, ost cache and client cache. That will be nice of you to
> help me for my study.
All of the Lustre documentation is linked from:
http://wiki.lustre.org/index.php/Lustre_Documentation
Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.
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