Which SP serves my Virtual Volume on Unity

Question

Hi, I'm trying to use VVOLS on my unity 300 hybrid box. I create some pools and then a Virtual Volume whose space is provided from these pools. The problem is I cannot find where I can set which SP serves this VVOL or even the pools. When I create traditional blocks .. It's Ok and I can select a default SP for the LUN, But as I said in virtual volumes I cannot find the way to do this. I need to do this in order to make the best possible Failover/Load baalnce Scenario .. Thanks

MdGanji · Answer

I searched CLI too no chance there .. no option to choose a SP for a VVOL or Pool. So I'm waiting and stuck whether to use VVOLS or not .. It's a shame if it's not possible to do these ..

MdGanji · Answer

No Answer for this ?My VVOL seems to be served by just one SP. The other SP I/O and BW is near zero so all disks and pools in my VVOL are just served by one SP.It's frustrating ..

Rainer_EMC · Answer

is this a block or a file vVol ?

MdGanji · Answer

Block VVOL

hammertechie · Answer

HI - Is it possible to control the placement through CLI or due to nature of vVOLS (using SPBM) we cannot control this?

Rainer_EMC · Answer

for block vVols the SP ownership is assigned automatically If you have enough vVols - over 20 IIRC - you will see that they are distributed across SP's

MdGanji · Answer

What ?! 20 VVOLS ? Maybe we're talking about different things ...

We use VVOLS to avoid creating different LUNs and ..

So the number of VVOLS is very low, one or two maybe.

I have 10 disks - RAID 5 - 10 Disks RAID 10 so I have created two profiles for them named MyGold and MySilver

Then these are grouped and added to a VVOL named MyVVol and in vmware I choose the profile and the VM goes to one of these groups of disk.

So, Clearly I have one VVOL and this is the reason why we choose VVOL instead of static pools and blocks, to reduce management overhead.

And you say I should have 20 VVOLS ?!?

Is there any misunderstanding ?

And if you mean the vm files (what is displayed in virtual volumes tab) I should say that I have 103 items there but to my very disappointment, It's obvious that only one SP is serving the whole system

Rainer_EMC · Answer

I think you mix up vVol datastores or profiles with vVols

If you are using VMware Virtual Volumes then each VM hast at least 2 vVols - config and data

plus an additional swap when its powered up

plus a vVol per logical disk

Are you saying you are using only one or two virtual machines ?

MdGanji · Answer

No, Please read the last paragraph of my reply :

" And if you mean the VM files (what is displayed in virtual volumes tab) I should say that I have 103 items there but to my very disappointment, It's obvious that only one SP is serving the whole system "

Rainer_EMC · Answer

That shouldnt be the case

you cannot see the SP ownership directly for a vVol in the GUI

but if you look closely you should be able to see that you have two PE's - one for each SP

with your 100+ vVols you should see that they are distributed between the PE's

If that is not the case then please open a service request

support should be able to see from a support dump or via svc_storagecheck

Unity

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