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Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large mem
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps |
Date: |
Mon, 8 Aug 2011 15:56:03 +0100 |
On Mon, Aug 8, 2011 at 3:47 PM, Avi Kivity <address@hidden> wrote:
> On 08/08/2011 05:46 PM, Avi Kivity wrote:
>>
>> Please provide documentation in docs/ of the compression format.
>>
>> IMO it should be disabled by default (with an option to disable it, via,
>> sat, migrate-set-options, so we can migrate to older hosts).
>>
>> The protocol should allow XBZRLE to turn itself off if it detects that it
>> isn't effective.
>>
>
> IOW, this should be part of the standard migration protocol, not some side
> option that is enabled if the user remembers. It should not be mutually
> exclusive with future migration extensions, including compression.
This is an attractive option. With some polish maybe XBZRLE could be
integrated as a default option that does not degrade performance.
Adding features that require user configuration isn't worthwhile
because they won't be used or they'll be misused - let's not make QEMU
more complicated if it can be avoided.
If there is no way to make XBZRLE automatic then I think it should
live outside QEMU because it will be a niche feature that relatively
few will use but adds complexity to migration.
Stefan
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, (continued)
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Avi Kivity, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Anthony Liguori, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Avi Kivity, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Anthony Liguori, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Avi Kivity, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Anthony Liguori, 2011/08/08
Re: [Qemu-devel] [libvirt] [PATCH v4] XBZRLE delta for live migration of large memory apps, Daniel P. Berrange, 2011/08/08
Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Avi Kivity, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Avi Kivity, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Anthony Liguori, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Avi Kivity, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Anthony Liguori, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Avi Kivity, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Anthony Liguori, 2011/08/08
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Shribman, Aidan, 2011/08/10
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Avi Kivity, 2011/08/10
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Anthony Liguori, 2011/08/10
- Re: [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps, Avi Kivity, 2011/08/10