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Re: [Xen-users] Really slow disk write on Ubuntu

from [Martinx - ジェームズ] [Permanent Link][Original]
To: rudi <rudolone@xxxxxxxxx>
Subject: Re: [Xen-users] Really slow disk write on Ubuntu
From: Martinx - ジェームズ <thiagocmartinsc@xxxxxxxxx>
Date: Mon, 24 May 2010 16:38:24 -0300
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I have a lot of Ubuntu 10.04 as paravirtual machines on top of the Xen without any modifications, no patches needed.

On 24 May 2010 14:26, rudi <rudolone@xxxxxxxxx> wrote:
David Markey wrote:
Why not use paravirtualise?

AFAIK paravirtualising Ubuntu is troublesome and requires a little work a the moment (a kernel patch and so on), so we did a quick test para-virtualising the standard "Oracle Enterprise Linux 5 64-bit" provided by Oracle, on top of Oracle-vm and running the same benchmarks.

Results were sligthly better but still far from our expectations. Disk writes around 10-15 MB/s.

My doubt is: should we expect much better results (and by consequence, there is a big misconfiguration/mistake somewhere in our stack) or these results are typical and unexceptional for this kind of systems?




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