Hi everyone, Can anyone answer these questions Gaurav has about secondary storage?
Marcus - Perhaps you know for KVM? Kelven - Perhaps you know for VMware? Thanks! Mike On Wed, Dec 10, 2014 at 4:55 AM, Gaurav Aradhye <gaurav.arad...@clogeny.com> wrote: > Thanks Mike for details reply! > > I checked on VMware and KVM. On KVM, after first snapshot, the secondary > storage count for account increases by 1 (template + snapshot I suppose). > After second snapshot, it again increases by 1. > > On VmWare, the secondary storage count remains the same irrespective of how > many snapshots I create. > > This is clearly an issue. > > I have two questions. > > 1) How can we know the snapshot size? The size is not listed in any API. > 2) Is snapshot size counted in secondary storage count (and hence > considered in SS limits)? I just want to be sure here. > > Regards, > Gaurav > > On Tue, Dec 9, 2014 at 11:17 AM, Mike Tutkowski < > mike.tutkow...@solidfire.com> wrote: > > > 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>*™* > > > -- *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>*™*
