On Wed, Apr 29, 2015 at 06:51:08PM -0400, John Snow wrote: > This is a feature that should be very easy to add on top of the existing > incremental feature, since it's just a difference in how the bitmap is > treated: > > Incremental > - Links to the last incremental (managed by libvirt) > - Clears the bitmap after creation > > Differential: > - Links to the last full backup always (managed by libvirt) > - Does not clear the bitmap after creation > > No biggie.
Differential backups can be done using incremental backup functionality in QEMU: The client application points QEMU to the same target repeatedly instead of keeping separate incremental backups. Stefan
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