NetApp Cache question

Need a recommendation for my NetApp cache. I have only have 4 SSD's in the system and I have assigned them all to the same node. My question is what aggregate should I attach the cache too, so that I get the most benefit from it? This is a tentative layout for my new aggregates, any recommendations would be greatly appreciated. Thank you

This is a SAN for my VMware infrastructure. All the Databases will be running on VM's

Agg-1 = DB MDF
Agg-2 = OS and Programs
Agg-3 = Temp DB
Agg-4 = DB Log
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progjmAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
usually, you would create one large aggregate, and then allocate the 4 SSDs, to this, to create a hybrid aggregate.

Also with only four SSDs, you will need to organise them as follows, to ensure a supported configuration

2 for data
1 for parity
1 for spare.
progjmAuthor Commented:
Unfortunately the way NetApp is using the drives I have had to create 4 aggregates.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You will have to pick an aggregate then.

I would look at the performance and latency of the LUN / Exports in those aggregates, and apply create the hybrid aggregate.

How many disks have you got per aggr ?

because higher numbers of disks, will give you higher throughput, and IOPS. (for the LUNs and Volumes/Exports) in the aggr.
Paul SolovyovskySenior IT AdvisorCommented:
I agree with Andrew, you could have created a single aggregate and created the LUNs from there so that the 4 SSD drives would have been for the entire aggregate and you could get capacity back.  In this case I would put the drives on Temp which has the most IO usually by I would use Netapp Performance OVA to understand what is using the most read IO since the flash pool only covers Read cache (also does overwrite caching a bit).

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progjmAuthor Commented:
Thank you
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