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Re: [Xen-devel] does 'xm save' compress?


  • To: James Harper <james.harper@xxxxxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir@xxxxxxx>
  • Date: Mon, 07 Feb 2011 12:58:09 +0000
  • Cc:
  • Delivery-date: Mon, 07 Feb 2011 05:00:35 -0800
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  • Thread-topic: [Xen-devel] does 'xm save' compress?

On 07/02/2011 12:13, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:

> Does 'xm save' compress the data it writes to disk? Someone on another
> (non-xen) mailing list pointed out that the bottleneck to a quick
> shutdown/restore that didn't overly interrupt DomU's was the time taken
> to suspend the DomU's on Dom0 shutdown and then resume them again on
> Dom0 restart, and I can see the point, especially if the data wasn't
> compressed and it had to write out every raw byte to disk...

No compression at the moment, although presumably wouldn't be hard to add.

 -- Keir

> James 
> 
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