Thanks, Amogh! I think there is a problem then as we only ever update the chain_info in the DB after a VM has been started.
For example, if I take a snapshot of a VM and then look in the DB at chain_info in the volumes table, that new snapshot is not recorded as being a part of the chain. If I stop the VM, then re-start it, the chain_info field gets updated. On Fri, Apr 25, 2014 at 2:29 PM, Amogh Vasekar <[email protected]>wrote: > Hi, > > This is the info I have from Mice from sometime last year, not sure if it > is relevant. Sadly, I am unable to attach the original HTML message, I > will forward it off the list to you > ================== > > 1) When a VM is created, the root volume and data volume are just > single node in storage > > > 2) After take a Disk Snapshot, leaf nodes are created as current > volume (this is vmware case), their parents nodes are not active and are a > part of snapshots. > > Two usage events are generated, since there are two volumes for > this VM. > Usage event: VMSnapshot, volumeId:root; vmid: xxxx; size: sizeOf(Root) > VMSnapshot, VolumeId:data; vmid:xxxx; size: sizeOf(Data) > > 3) After take a DiskMemory Snapshot: > > Two usage events are generated,. > Usage event: VMSnapshot, volumeId:root; vmid: xxxx; size: sizeOf(Root) + > sizeOf(ROOT-00001) + sizeOf(memoryImage) > VMSnapshot, VolumeId:data; vmid:xxxx; size: sizeOf(Data) + > sizeOf(Data-00001) > > > Please note the size in usage event is CURRENT chain size of a volume. > =================== > > > > On 4/25/14 1:11 PM, "Mike Tutkowski" <[email protected]> wrote: > > >Hi, > > > >I logged a JIRA ticket with regards to how we calculate > >vm_snapshot_chain_size in the volumes table (with regards to VMware). > > > >https://issues.apache.org/jira/browse/CLOUDSTACK-6514 > > > >If someone out there with a bunch of VMware experience could take a look > >at > >that ticket and comment on whether or not this is a problem, that would be > >great. > > > >Thanks! > > > >-- > >*Mike Tutkowski* > >*Senior CloudStack Developer, SolidFire Inc.* > >e: [email protected] > >o: 303.746.7302 > >Advancing the way the world uses the > >cloud<http://solidfire.com/solution/overview/?video=play> > >*(tm)* > > -- *Mike Tutkowski* *Senior CloudStack Developer, SolidFire Inc.* e: [email protected] o: 303.746.7302 Advancing the way the world uses the cloud<http://solidfire.com/solution/overview/?video=play> *(tm)*
