HPE Storage Users Group

Dear Forum Members,

As a 3PAR newbie I try to follow the HP white papers and best practises guides as much a possible, although sometimes I would like to have a little bit of understanding whether a particular best practise is really applicable to my environment.

As per HP best practices for VMware guide (4AA4-4524ENW.pdf) the number of CPGs should be limited to minimum.

As a matter of fact, for (human) readability purposes only, I would like to have 3 x R10 FC CPGs, 3 x R50 FC CPGs and 3 x R60 NL CPG.
Does it cause and performance implications?

Many thanks!

There is no performance impact to having fewer or more cpg's, but cpg's are a policy set, not a disk set or anything like that so your description of having 9 cpg's with 3 disk layouts doesn't necessarily make sense unless you are planning something like:
AO1-nonprod
Tier1 R10FC
Tier2 R5-8FC
Tier3 R6-14NL

AO2-general prod
Tier1 R10FC
Tier2 R5-8FC
Tier3 R6-8NL

AO3-highperf prod
Tier1 R10FC
Tier2 R5-4FC
Tier3 R6-8NL (snapshots only)

I have always understood it as the least amount of CPGs the better. Also keep in mind, I believe I read there is a maximum of 256 VV's per CPG? I believe that is only for the new TDVV's per SSD CPG.

Hmm, I wonder how that interacts with VMWare vvols since it's my understanding that under the hood each VM gets one or more 3Par vvols.

For a 7000 series using tpvv's, there is a maximum of 8192 vv's per cpg.

I dont think that changes for a tdvv, but I could be wrong. On the 10000 series the max is even higher

From this link: http://h20565.www2.hp.com/hpsc/doc/publ ... cale=en_US

Known Thin Deduplication limitations in HP 3PAR OS 3.2.1 MU1 are as follows:
• CPGs with TDVV volumes cannot be part of an Adaptive Optimization configuration.
• The maximum number of TDVVs per CPG is 256; there is no limit on the number of TDVV
snapshots.
• Peer Motion is currently not supported for TDVVs.
• Online Import from EVA and EMC Storage directly to TDVV volumes is not supported. As a
workaround it’s possible to import to a TPVV and then covert to TDVV

I doubt this has changed for MU2? I am also curious about vSphere 6 VVols and how this is going to work. I should have vSphere setup next week and can start testing it so fingers crossed. I would ASSUME this isn't an issue as it would be a pretty big one... but you never know....