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[Xen-users] "xm save" needs way too much disk space

from [Ulrich Windl]

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Subject:	[Xen-users] "xm save" needs way too much disk space
From:	"Ulrich Windl" <ulrich.windl@xxxxxxxxxxxxxxxxxxxx>
Date:	Wed, 11 Oct 2006 15:25:54 +0200
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Hi!

When trying an "xm save" ("xm restore") for a VM with 8GB virtual RAM, the save 
file had a size of about 8GB. This seems quite unattractive, because:
1) Some of the pages have never been written by DomU, so they need not be saved
2) RAM can definitely be compressed before writing to disk
3) it takes longer to save and restore than to boot

Regards,
Ulrich


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