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Re: [Xen-users] Xen on a HPC Cluster

from [Javier Guerra]

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To:	Allysson Steve Mota Lacerda <stevelacerda@xxxxxxxxx>
Subject:	Re: [Xen-users] Xen on a HPC Cluster
From:	Javier Guerra <javier@xxxxxxxxxxx>
Date:	Fri, 30 Jan 2009 11:35:03 -0500
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2009/1/30 Allysson Steve Mota Lacerda <stevelacerda@xxxxxxxxx>:
> Hi folks.
> I have some old servers running Windows and Linux and I want to create a HPC
> cluster. However I wanna know if Xen can distribute a single virtual machine
> along multiple nodes to increase it's performance.


no.

how would that work?  an emulated CPU is a single thread of execution,
a single threaded work can't be distributed.  if you a multi-cpu VM,
then in theory you could process each VCPU on a different node, but
then how would you emulate the single RAM space? over the network???
that would brutally kill performance.


-- 
Javier

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