[jira] [Updated] (CLOUDSTACK-6514) VMware: Is space allocated for snapshots counted correctly?

["Animesh Chaturvedi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CLOUDSTACK-6514?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Animesh Chaturvedi updated CLOUDSTACK-6514:
-------------------------------------------
    Assignee: Likitha Shetty

> 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: Likitha Shetty
>             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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