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4086

February 19th, 2014 12:00

Which 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

286 Posts

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.

30 Posts

February 19th, 2014 13:00

Thanks for the quick reply! I suppose this is not the place to ask when XCOPY will be supported.

286 Posts

February 19th, 2014 13:00

Sure thing! Yeah--something for your EMC rep to ask VPLEX Product Mgmt about.

89 Posts

February 19th, 2014 14:00

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

89 Posts

May 23rd, 2014 00:00

Update:  XCOPY support has been released with GeoSynchrony 5.3.

Gary

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