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Re: [Qemu-devel] [PATCH 4/5] Disable XBZRLE during migrate to file if it
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-devel] [PATCH 4/5] Disable XBZRLE during migrate to file if it is active |
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Date: |
Wed, 30 Jan 2013 10:59:30 -0700 |
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Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 |
On 01/30/2013 03:35 AM, Orit Wasserman wrote:
> XBZRLE is not effective when migrating to file.
Why not? When doing a live migration to file, the same sector of memory
can be visited more than once in the migration stream, and thus
compressing the later pages should make the saved file smaller. I'm not
sure I buy this argument of XBZRLE being incompatible with migration to
file, at least without not more explanation why it fails.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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[Qemu-devel] [PATCH 5/5] Fix error message in migrate_set_capability HMP command, Orit Wasserman, 2013/01/30