I guess I would expect the non-zero blocks of your disk to be backed up the first time, which could lead to anywhere from some small amount of space all the way up to 8 GB (in your situation).
However, you mentioned that you see 9 GB consumed, which does seem unexpected. When you say your template is 8 GB, I assume that's its physical size (and the root disk's virtual size could be larger). If that's the case, I would expect 8 GB to be backed up for the first snapshot. On Mon, Dec 8, 2014 at 10:39 PM, Gaurav Aradhye <gaurav.arad...@clogeny.com> wrote: > Thanks Mike! > > However, I am observing this in case of first snapshot also. Let me try on > various hypervisors to see the behavior. > > Regards, > Gaurav > > On Tue, Dec 9, 2014 at 11:04 AM, Mike Tutkowski < > mike.tutkow...@solidfire.com> wrote: > > > I'm not exactly sure how this number is calculated, but - if you are > using > > XenServer - remember that after the first snapshot for a volume, each > > subsequent snapshot is only the blocks that have changed since the prior > > snapshot (this might even be true for ESX these days with CloudStack). > > > > That being the case, unless you change all 8 GB of blocks each time > before > > doing a snapshot, you should expect your snapshots to be < 8 GB > > (potentially very small, if you didn't change much since the last > > snapshot). > > > > On Mon, Dec 8, 2014 at 10:15 PM, Gaurav Aradhye < > > gaurav.arad...@clogeny.com> > > wrote: > > > > > Hello, > > > > > > When I create a snapshot, from say, template registered through an > > account, > > > then > > > > > > 1) How can I know the snapshot size on secondary storage? (API > > > listSnapshots does not specify the snapshot size) > > > > > > 2) How is snapshot size counted in secondary storage used by the > account? > > > Currently I can see secondary storage count increasing by the (number > of > > > snapshots) and not the snapshot size. > > > > > > E.g. I have template sized 8 GB. I create a snapshot from it. Now if I > > list > > > the secondary storage used by the account, then it lists as "9" (GB). > If > > I > > > create another snapshot, then it lists it as 10. It is not possible for > > my > > > snapshot size to be 1 (GB) because it's created from root volume having > > > size 8 GB. > > > > > > Can I say it's a bug? Secondary storage count being listed as (Storage > > > other than snapshot + number of snapshots) GB. > > > > > > Regards, > > > Gaurav > > > > > > > > > > > -- > > *Mike Tutkowski* > > *Senior CloudStack Developer, SolidFire Inc.* > > e: mike.tutkow...@solidfire.com > > o: 303.746.7302 > > Advancing the way the world uses the cloud > > <http://solidfire.com/solution/overview/?video=play>*™* > > > -- *Mike Tutkowski* *Senior CloudStack Developer, SolidFire Inc.* e: mike.tutkow...@solidfire.com o: 303.746.7302 Advancing the way the world uses the cloud <http://solidfire.com/solution/overview/?video=play>*™*
