[Devel] Re: Slow file transfer speeds with CFQ IO scheduler in some cases

[Alexey Dobriyan]

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 at openvz.org.