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Re: [Xen-users] XEN write speed

To: "Daniel P. Berrange" <berrange@xxxxxxxxxx>
Subject: Re: [Xen-users] XEN write speed
From: James Wilson <jwilson@xxxxxxxxxxxxxxxxx>
Date: Thu, 21 Jun 2007 12:56:27 -0500
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The space is fully allocated.

Daniel P. Berrange wrote:
On Thu, Jun 21, 2007 at 10:55:23AM -0500, James Wilson wrote:
Looking for some advice on write speed. I currently have my domU's installed to 8GB files on a GFS file system. When I create these domU's and try to write to them the speed is horrible something that should take 10 seconds takes about 2 minutes. Is there any way to speed up the write speed for this configuration? Here is what my .cfg file looks like.

Are the files for your disk  sparse, or fully-allocated ? If they are
sparse, then you should re-create them as fully pre-allocated. Whenever
a sparse disk has to be extended to allocate further blocks performance
is horrific.

Dan.

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