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Go to SolutionWhich VAAI command in latest VPLEX ?
Hello,
It's not clear for me which VAAI commands are support by the latest VPLEX Metro (5.2. SP1 P1).
WriteSame is mentionned for release 5.2.P1 https://support.emc.com/docu48041_VPLEX_with_GeoSynchrony_5.2_Patch_1_Release_Notes.pdf?language=en_US
ATS (or CAW) in 5.1 :https://support.emc.com/docu40034_VPLEX_GeoSynchrony_Release_5.1_and_Patches_Release_Notes.pdf?language=en_US
But what about XCOPY?
If we use 1-1 devices in the VPLEX and the storage backaned array (ex VNX) supports all the VAAI commands, will VPLEX just pass-on the VAAI commands?
Thanks,
Francis
codyhosterman
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Posted February 19th, 2014 13:00
Sure thing! Yeah--something for your EMC rep to ask VPLEX Product Mgmt about.
ATS has been supported since GeoSynchrony 5.1.
WriteSame has been supported since GeoSynchrony 5.2.
XCOPY is planned for GeoSynchrony 5.3.
> If we use 1-1 devices in the VPLEX and the storage backaned array (ex VNX) supports all the VAAI commands, will VPLEX just pass-on the VAAI commands?
- VPLEX will pass along WriteSame commands when possible via the device layout, and if the back-end storage-array(s) supports VAAI WriteSame. Basically it tries it's best to utilize the array's writesame capabilities. If it cannot, the writesame becomes a write of zeros of the same size.
- ATS commands are handled just like a normal read/write.
- (No comment on XCOPY, yet...)
Gary
codyhosterman
286 Posts
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Posted February 19th, 2014 13:00
Right now only WRITE SAME and ATS are supported. XCOPY and UNMAP are not. WRITE SAME is passed through to the backend array if possible. I am not entirely sure about ATS though.