AFF, NVMe, and EF-Series Discussions
I have seen a number of presentations about the usage of PAM II to reduce the need for SAS or FC disk. Is there any real guidelines available or documentation to justify sizing?
Generally I want to be able to size two specs, one with PAM one without and price them out for my customers.
Thanks in advance for any help!
There are NetApp Sizers (e.g. Exchange) that can size for both with PAM and without PAM. You should probably ask your NetApp support engineer to help.
TR-3744 does give some real world numbers (albeit with the original 16 GB PAM).
In short, the performance of "224 15k FC disks" = "112 15k FC disks + PAM I" = "112 7200 RPM SATA + PAM I".
Pretty cool stuff....
Thanks Andew, for pointing this out.
There is also TR-3766 (http://media.netapp.com/documents/tr-3766.pdf) on PAM I and Exchange 2007. I expect Flash Cache (PAM II) will do even better because of large cache size.
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