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https://issues.apache.org/jira/browse/VCL-718?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Kurth updated VCL-718:
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Fix Version/s: (was: 2.5)
> Add optional automatic execution of sdelete.exe to reduce vmdk size
> -------------------------------------------------------------------
>
> Key: VCL-718
> URL: https://issues.apache.org/jira/browse/VCL-718
> Project: VCL
> Issue Type: Improvement
> Components: vcld (backend)
> Reporter: Andy Kurth
>
> VMware .vmdk files stored thin will grow as data is written to the VM's hard
> drive. When data is deleted from the VM, the size of the .vmdk remains the
> same. Data is not reclaimed. Example, start with a 15GB .vmdk and load a
> VM. Write 10GB to the VM's hard drive and delete this data. Save the image.
> The size of the new image .vmdk will be ~ 25GB.
> There is a new feature with vmfs5 which allows data to be reclaimed but I've
> read where this may cause performance degradation.
> The size of the .vmdk can be reduced by running 'sdelete.exe -z' on the VM
> before an image is captured. This writes 0's to all of the empty disk space.
> At this point, the size of the .vmdk is equal to the total disk size (no
> longer thin).
> After shutting down the VM, vmkfstools -K (punchzeros) can be run to reclaim
> all empty disk space. I'm not exactly sure what this does but the result in
> the example above would be a 15GB .vmdk.
> We could add a tools/Windows/Utilities/sdelete directory. The sdelete.exe
> utility would have to be downloaded and saved in this directory on the
> management node. The pre_capture code would check if sdelete.exe exists and
> run it after deleting the pagefile and rebooting. A flag would be set if
> sdelete.exe was run and vmkfstools -K would be run if true.
> I'm not sure if there's an equivalent function using the vSphere SDK. It
> would need to be researched.
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