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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] [RFC] qed: Add QEMU Enhanced Disk format |
Date: | Wed, 08 Sep 2010 15:28:50 -0500 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.11) Gecko/20100713 Lightning/1.0b1 Thunderbird/3.0.6 |
On 09/08/2010 03:23 PM, Christoph Hellwig wrote:
On Wed, Sep 08, 2010 at 11:30:10AM -0500, Anthony Liguori wrote:http://wiki.qemu.org/Features/QED/OnlineDefrag Is a spec for a very simple approach to online defrag that I hope we can implement in the near future. I think that once we have the mechanisms to freeze clusters and to swap clusters, implementing much more sophisticated defragmentation algorithms will become easy.This image defragmentation might in fact cause even more fragmentation at the filesystem layer.
That's a good point. Is there a reasonable way to do this cooperatively with the underlying filesystem?
BTW, the same problem would occur for sparse file system images, no? Regards, Anthony Liguori
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