From: Michael Tokarev <mjt@tls.msk.ru>
To: Janek Kozicki <janek_listy@wp.pl>
Cc: Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: raid10: unfair disk load?
Date: Fri, 21 Dec 2007 23:56:09 +0300 [thread overview]
Message-ID: <476C2869.1080903@msgid.tls.msk.ru> (raw)
In-Reply-To: <20071221174902.6fc02c4e@absurd>
Janek Kozicki wrote:
> Michael Tokarev said: (by the date of Fri, 21 Dec 2007 14:53:38 +0300)
>
>>> I just noticed that with Linux software RAID10, disk
>>> usage isn't equal at all, that is, most reads are
>>> done from the first part of mirror(s) only.
>
> what's your kernel version? I recall that recently there have been
> some works regarding load balancing.
It was in my original email:
> The kernel is 2.6.23 but very similar behavior is
> shown by earlier kernels as well. Raid10 stripe
> size is 256Mb, but again it doesn't really matter
> other sizes behave the same here.
Strange I missed the new raid10 development you
mentioned (I follow linux-raid quite closely).
Lemme see... no, nothing relevant in 2.6.24-rc5
(compared with 2.6.23), at least git doesn't show
anything interesting. What change(s) you're
referring to?
Thanks.
/mjt
next prev parent reply other threads:[~2007-12-21 20:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <476BA4FD.6080401@msgid.tls.msk.ru>
2007-12-21 11:53 ` raid10: unfair disk load? Michael Tokarev
2007-12-21 16:49 ` Janek Kozicki
2007-12-21 20:56 ` Michael Tokarev [this message]
2007-12-22 12:05 ` Janek Kozicki
2007-12-22 13:04 ` Jon Nelson
[not found] ` <beb6123c0712222034g68743afv31c644ff4dd9aaff@mail.gmail.com>
2007-12-23 12:36 ` Michael Tokarev
[not found] ` <beb6123c0712230521r2a8a43aboe097fc2fc943c3ae@mail.gmail.com>
2007-12-23 14:23 ` Jon Nelson
2007-12-23 19:22 ` Richard Scobie
2007-12-25 20:18 ` Bill Davidsen
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