From: Ian Pilcher <arequipeno@gmail.com>
To: linux-raid@vger.kernel.org
Subject: Small chunk size read performance penalty
Date: Sun, 18 Aug 2013 17:05:01 -0500 [thread overview]
Message-ID: <kurge6$qi0$1@ger.gmane.org> (raw)
Can anyone point me to a good explanation of the read performance impact
of small (RAID-5 and RAID-6) chunk sizes?
I understand why large chunks hurt write performance, but I haven't been
able to reason through the small-chunk/read case, and my Interweb
searches haven't really turned anything up.
The "read penalty" is definitely there; I can see it in the test data
from my NAS. I just don't understand *why* it's there.
Thanks!
--
========================================================================
Ian Pilcher arequipeno@gmail.com
Sometimes there's nothing left to do but crash and burn...or die trying.
========================================================================
next reply other threads:[~2013-08-18 22:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-18 22:05 Ian Pilcher [this message]
2013-08-18 22:16 ` Small chunk size read performance penalty Roberto Spadim
2013-08-19 1:40 ` Stan Hoeppner
2013-08-19 5:49 ` Ian Pilcher
2013-08-20 2:28 ` Stan Hoeppner
2013-08-19 3:01 ` Roberto Spadim
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