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3PAR Space Reclamation - ESX UNMAP and zero detect

Berd
Trusted Contributor

3PAR Space Reclamation - ESX UNMAP and zero detect

Morning Peers - we are going through an exercise to UNMAP (write zero) to unused datastore blocks within our Vcentre. From the 3PAR end, I can see the used storage reducing, but the reserved space does not decrease and when viewing the free space on the array I do not see this increase. Is there another housekeeping task, other than compactcpg,  that I need to run to reduce the reserved space ?

Thanks,

Berd

3 REPLIES
yapkl
Trusted Contributor

Re: 3PAR Space Reclamation - ESX UNMAP and zero detect

What is your ESX version, and how are you reclaiming the space?

Best Regards,

yapkl

Note: The opinions & comments above are my personal opinions, not of Hewlett Packard Enterprise
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Berd
Trusted Contributor

Re: 3PAR Space Reclamation - ESX UNMAP and zero detect

Hi there,

ESX 5.5

VMware admin is actually actioing reclaim from ESX CLI. When he does this I can see the used space reducing on the 3PAR, but reserved space does not reduce, see below.

 cli% showvv -s DC13PAR01_MSP_VMFS04
                                  ---Adm--- ----------Snp----------- ------------Usr-------------
                                  --(MB)--- ---(MB)---- -(% VSize)-- -----(MB)------ -(% VSize)-- ------(MB)------ -Capacity Efficiency-
Id Name                 Prov Type Rsvd Used   Rsvd Used Used Wrn Lim    Rsvd    Used Used Wrn Lim Tot_Rsvd   VSize   Compaction    Dedup
13 DC13PAR01_MSP_VMFS04 tpvv base 3584 2389 592000 1039  0.0   0   0 2408448 1448226 34.5   0   0  3004032 4194304          2.9       --
----------------------------------------------------------------------------------------------------------------------------------------
 1 total                          3584 2389 592000 1039              2408448 1448226               3004032 4194304          2.9       --

Around 1TB reduction in used space, but reserved space still up at 2.4TB appx ?

yapkl
Trusted Contributor

Re: 3PAR Space Reclamation - ESX UNMAP and zero detect

Compact CPG should help you free up the space.

Best Regards,

yapkl

Note: The opinions & comments above are my personal opinions, not of Hewlett Packard Enterprise
----------
If my post was useful, click on my KUDOS! thumb below! Thanks.