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Date: Sun, 9 Nov 2008 21:30:43 +0300
From: Alexey Dobriyan <adobriyan@gmail.com>
To: "Vitaly V. Bursov" <vitalyb@telenet.dn.ua>
Cc: linux-kernel@vger.kernel.org, devel@openvz.org
Subject: Re: Slow file transfer speeds with CFQ IO scheduler in some cases
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References: <4917263D.2090904@telenet.dn.ua>
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On Sun, Nov 09, 2008 at 08:04:45PM +0200, Vitaly V. Bursov wrote:
> I'm building small server system with openvz kernel and have ran into
> some IO performance problems. Reading a single file via NFS delivers
> around 9 MB/s over gigabit network, but while reading, say, 2 different
> or same file 2 times at the same time I get >60MB/s.

openvz kernels have very changed CFQ and, IIRC, this one-reader problem is
fixed somewhere. Ask devel@openvz.org.
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