On 01/16/2013 10:31 AM, Paolo Bonzini wrote: > The desired granularity may be very different depending on the kind of > operation (e.g. continuous replication vs. collapse-to-raw) and whether > the VM is expected to perform lots of I/O while mirroring is in progress. > > Allow the user to customize it, while providing a sane default so that > in general there will be no extra allocated space in the target compared > to the source. >
> +++ b/qapi-schema.json > @@ -1636,6 +1636,11 @@ > # (all the disk, only the sectors allocated in the topmost image, or > # only new I/O). > # > +# @granularity: #optional granularity of the dirty bitmap, default is 64K > +# if the image format doesn't have clusters, 4K if the clusters > +# are smaller than that, else the cluster size. Must be a > +# power of 2 between 512 and 64M. Mention that granularity was only added in 1.4. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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