On 01/05/2016 08:55 AM, Eric Blake wrote: > On 01/05/2016 05:10 AM, lihuiba wrote: > >>>> In our production environment, we need to extend a qcow2 image with >>>> snapshots in it. > >>> The thing is that one would need to update all the inactive L1 tables. I >>> don't think it should be too difficult, it's just that apparently so far >>> nobody ever had the need for this feature. > > Is resizing a snapshot really what you want? Ideally, a snapshot tracks > the data from a point in time, including the metadata of the size being > tracked at that time. Extending the snapshots then reverting to that > snapshot means your guest would see a larger disk on revert than it did > at the time the snapshot was created, which guests might not handle very > well. >
Unless reverting to a snapshot also implied undoing the re-size.
