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| From: | Avi Kivity |
| Subject: | Re: [Qemu-devel] [PATCH v3] XBZRLE delta for live migration of large memory apps |
| Date: | Wed, 03 Aug 2011 01:38:58 +0300 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:5.0) Gecko/20110707 Thunderbird/5.0 |
On 08/02/2011 05:01 PM, Alexander Graf wrote:
So if I understand correctly, this enabled delta updates for dirty pages? Would it be possible to do the same on the block layer, so that VM backing file data could potentially save the new information as delta over the old block? Especially with metadata updates, that could save quite some disk space.
Just use a smaller block size. While you could save even more when considering metadata, I think the bulk of the gain would be in actual data.
-- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.
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