topic Re: PAM II architecture in AFF

PAM II architecture

gcoburn — Thu, 05 Jun 2025 07:16:15 GMT

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!

Re: PAM II architecture

lwei — Sun, 04 Apr 2010 17:23:42 GMT

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

Re: PAM II architecture

amiller_1 — Sun, 18 Apr 2010 06:02:09 GMT

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....

Re: PAM II architecture

lwei — Sun, 18 Apr 2010 18:52:30 GMT

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