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https://issues.apache.org/jira/browse/CLOUDSTACK-6514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14209461#comment-14209461
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Likitha Shetty commented on CLOUDSTACK-6514:
--------------------------------------------
Mike, since we default to linked clone now should we consider the size of the
base ROOT file as well?
> VMware: Is space allocated for snapshots counted correctly?
> -----------------------------------------------------------
>
> Key: CLOUDSTACK-6514
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-6514
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: VMware
> Affects Versions: 4.4.0
> Environment: Ubuntu 12.04 for CloudStack Management Server (just one
> in this config)
> Two ESXi 5.1 hosts
> Reporter: Mike Tutkowski
> Assignee: Mike Tutkowski
> Fix For: 4.4.0, 4.5.0
>
>
> long CapacityManager.getAllocatedPoolCapacity(StoragePoolVO, VMTemplateVO)
> may not add up allocated space in the passed-in storage pool properly for
> VMware.
> The idea is to count the allocated space of all non-destroyed volumes and the
> corresponding allocated space of their snapshots, if any. In addition,
> templates on the storage pool should be taken into consideration.
> I think the number that is in the vm_snapshot_chain_size column of the
> volumes table is not correctly calculated (and this number is used by the
> getAllocatedPoolCapacity method when it invokes another method).
> This is how it currently works when you have a new VM and you take a snapshot
> of it for the first time (not taking a snapshot of memory):
> These are the relevant files and their respective sizes:
> ROOT-21-000001-delta.vmdk (16,785,408 bytes)
> ROOT-21-000001.vmdk (316 bytes)
> ROOT-21-flat.vmdk (2,147,483,648 bytes)
> ROOT-21.vmdk (515 bytes)
> i-2-21-VM-Snapshot1.vmsn (28,310 bytes)
> We include these files for the vm_snapshot_chain_size:
> ROOT-21-flat.vmdk (2,147,483,648 bytes)
> ROOT-21.vmdk (515 bytes)
> i-2-21-VM-Snapshot1.vmsn (28,310 bytes)
> I think we should be counting these instead:
> ROOT-21-000001-delta.vmdk (16,785,408 bytes)
> ROOT-21-000001.vmdk (316 bytes)
> i-2-21-VM-Snapshot1.vmsn (28,310 bytes)
> My thinking is that when we add up the total space that this volume consumes
> that we've already taking into account 2,147,483,648 bytes because this value
> is stored in the size column of the volumes table.
> I would think we'd want to add up the sizes of the VMSN files and the sizes
> of the -xxxxxx files to arrive at vm_snapshot_chain_size?
> Any thoughts on this?
> Thanks!
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