From: Peter Rabbitson <rabbit@rabbit.us>
Cc: linux-raid@vger.kernel.org
Subject: Re: LVM on raid10 - severe performance drop
Date: Mon, 11 Jun 2007 14:52:56 +0200 [thread overview]
Message-ID: <466D45A8.5060503@rabbit.us> (raw)
In-Reply-To: <20070610010644.GA24847@lanczos.q-leap.de>
Bernd Schubert wrote:
>
> Try to increase the read-ahead size of your lvm devices:
>
> blockdev --setra 8192 /dev/raid10/space
>
> or increase it at least to the same size as of your raid (blockdev
> --getra /dev/mdX).
This did the trick, although I am still lagging behind the raw md device
by about 3 - 4%. Thanks for pointing this out!
prev parent reply other threads:[~2007-06-11 12:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-09 23:56 LVM on raid10 - severe performance drop Peter Rabbitson
2007-06-10 1:06 ` Bernd Schubert
2007-06-11 12:52 ` Peter Rabbitson [this message]
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