On 10/12/2014 10:19 PM, Jd wrote: [please don't top-post on technical lists] > Thanks Kashyap, > The command line examples makes thing quite clear :) > rsync for image (large) files create a new file for every little > change, that was the reason I started looking in to using dirty bitmaps. Upstream qemu still doesn't have persistent dirty bitmap tracking working yet; once patches land there, then we also need to get libvirt to interact with those new qemu features. But yes, dirty bitmap tracking, so that you can track which portions of a file have changed rather than copying the entire file, is something that is technically feasible once the patches materialize. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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