On 08/25/2010 08:23 AM, Avi Kivity wrote:
On 08/25/2010 03:46 PM, Anthony Liguori wrote:
If we had another disk format that only supported growth and metadata
for a backing file, can you think of another failure scenario?
btw, only supporting growth is a step backwards. Currently
file-backed disks keep growing even the guest-used storage doesn't
grow, since once we allocate something we never release it. But
eventually guests will start using TRIM or DISCARD or however it's
called, and then we can expose it and reclaim unused blocks.
BTW, something that had the features of qcow2 that people actually used
andwas fully asynchronous, performed well, and had a high degree of
confidence in data integrity would be a major step forward, not backwards.
Regards,
Anthony Liguori
