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Re: [Xen-users] streaming server on a virtual machine.

To: "Fajar A. Nugraha" <fajar@xxxxxxxxx>
Subject: Re: [Xen-users] streaming server on a virtual machine.
From: Mauro <mrsanna1@xxxxxxxxx>
Date: Sat, 26 Sep 2009 20:57:36 +0200
Cc: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
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2009/9/26 Fajar A. Nugraha <fajar@xxxxxxxxx>:
> On Sun, Sep 27, 2009 at 12:56 AM, Mauro <mrsanna1@xxxxxxxxx> wrote:
>> 2009/9/26 Grant McWilliams <grantmasterflash@xxxxxxxxx>:
>>> I will also add that if Xen has a bottleneck it's traffic between DomUs.
>>> Don't configure it in any way to have
>>> one DomU servicing another DomU unless both have real  network cards
>>> attached to them.
>> Thank you for your answer it was very exhaustive.
>> I've learned a new thing, that is the poor performance in traffic
>> between domU in the same machine rather than domU in different
>> machines.
>> I've a domU with tomcat and many jruby applications and, in the same
>> machine, another domU as database server with postgres.
>> Based on what you say I've to reconfigure my systems to have domU in
>> different machines.
> Were you having network performance problems?
> There was a thread on this list some time ago about domU <-> domU
> network performance, and the ones that experience it were using newer
> pv_ops kernels while people who use 2.6.18 kernel (like RHEL/Centos5)
> or Suse -xen kernel got good performance.
> http://www.nabble.com/Fw%3A-Re%3A-bridge-throughput-problem-tt25328188.html#a25351569
> Instead of having a second physical server just to get decent
> performance, I'd say it's easier to simply change your dom0 kernel.

I'm using debian lenny amd64 with kernel 2.6.26 with dom0 and in all my domU.

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