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Re: Performance problems with millions of inodes

To: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Subject: Re: Performance problems with millions of inodes
From: Christoph Litauer <litauer@xxxxxxxxxxxxxx>
Date: Thu, 26 Jun 2008 13:29:42 +0200
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20080625180222.12885793@xxxxxxxxxxxxxxxxxxxx>
References: <4862598B.80905@xxxxxxxxxxxxxx> <48625A46.1060206@xxxxxxxxxxxxxx> <20080625180222.12885793@xxxxxxxxxxxxxxxxxxxx>
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Emmanuel Florac schrieb:
Le Wed, 25 Jun 2008 16:46:30 +0200
Christoph Litauer <litauer@xxxxxxxxxxxxxx> écrivait:

Maybe the 143 million inodes cause this effect? Any idea how to
avoid it?

Maybe you should try to add a "nobarrier" option at mount on the
slowest machine. Barriers can slow down operation tremendously...

Thanks for this hint. nobarrier improved file creation performance significantly (about 50 times).

Christoph Litauer                  litauer@xxxxxxxxxxxxxx
Uni Koblenz, Computing Center,     http://www.uni-koblenz.de/~litauer
Postfach 201602, 56016 Koblenz     Fon: +49 261 287-1311, Fax: -100 1311
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