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Re: [Xen-users] Sparse or non sparse

To: Nick Couchman <Nick.Couchman@xxxxxxxxx>
Subject: Re: [Xen-users] Sparse or non sparse
From: Paras pradhan <pradhanparas@xxxxxxxxx>
Date: Wed, 2 Jun 2010 14:45:04 -0500
Cc: Xen Users <xen-users@xxxxxxxxxxxxxxxxxxx>
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I am not worried about the space at this moment but worried about the performance. I know non sparse does not perform better than spasre images but don't know how much. Any rough numbers ?


On Wed, Jun 2, 2010 at 1:55 PM, Nick Couchman <Nick.Couchman@xxxxxxxxx> wrote:
That depends on how much space is available on the volume/disks that are storing this file, and how many other domUs are running there.  If there are many other domUs, or if this comes close to filling up your entire physical disk/array, this may not be a good idea, because you may overallocate your disk space and end up filling up the disk.


>>> On 2010/06/02 at 09:34, Paras pradhan <pradhanparas@xxxxxxxxx> wrote:
> Hi,
> Normally I use tap:aio with sparse img files to create a domUs.  I need to
> add a 1TB image to one domU and expecting that it would be almost 100% full
> before I extend it to 1.5TB. In this case is it safe to use sparse files?
> Thanks!
> Paras.

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