PAM II architecture

gcoburn · ‎2010-04-01

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!

lwei · ‎2010-04-04

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.

Thanks,

Wei

amiller_1 · ‎2010-04-17

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....

lwei · ‎2010-04-18

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.

Thanks,

Wei