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Re: Pid: 8345, comm: rsync Not tainted 2.6.32.22intel #1

To: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>
Subject: Re: Pid: 8345, comm: rsync Not tainted 2.6.32.22intel #1
From: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Date: Wed, 27 Oct 2010 08:04:54 +0200
Cc: xfs@xxxxxxxxxxx, "Stefan Priebe - Profihost AG" <s.priebe@xxxxxxxxxxxx>
In-reply-to: <201010270124.44846@xxxxxx>
Organization: Intellique
References: <4CC67450.9020602@xxxxxxxxxxxx> <4CC6B56B.7020007@xxxxxxxxxxxx> <20101026132505.6af29d5d@xxxxxxxxxxxxxxxxxxxx> <201010270124.44846@xxxxxx>
Le Wed, 27 Oct 2010 01:23:35 +0200 vous écriviez:

> BTW: any recommendations for these tuning knobs on VM-ized servers?
> What should be set in the VMs and what on the host?

From my experience, using iSCSI as the transport to export lvs to the
VMs, the best performance is reach by setting scheduler to noop and
queue depth on the target and the VM; but setting the readahead only on
the VM side.

For different configurations, as usual, YMMV. 

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