From: Bart Kus <me@bartk.us>
To: linux-raid@vger.kernel.org
Subject: Increasing maxsect of md devices?
Date: Wed, 02 Mar 2011 14:26:02 -0800 [thread overview]
Message-ID: <4D6EC3FA.4030809@bartk.us> (raw)
Hello,
This seems contradictory:
jo ~ # blockdev --getiomin /dev/md5
524288
jo ~ # blockdev --getioopt /dev/md5
4194304
jo ~ # blockdev --getmaxsect /dev/md5
255
jo ~ # blockdev --getbsz /dev/md5
4096
jo ~ # blockdev --getss /dev/md5
512
jo ~ #
Optimal IO size is reported as 4MB (and that is indeed the stripe size),
but maximum sectors per request is only 128kB? How can software do
optimal 4MB IOs with the maxsect limit? Does XFS care about this limit?
--Bart
next reply other threads:[~2011-03-02 22:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-02 22:26 Bart Kus [this message]
2011-03-02 22:59 ` Increasing maxsect of md devices? NeilBrown
2011-03-03 0:45 ` Bart Kus
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