I have a customer with some large PF presence and they are in planning phase to migrate from 2007 to 2010. I am looking for some guidance around the PF IOPS sizing. In the past unless the customer tells me that the PF is being used actively as a mail-in folders or something close to being active like a common user mailbox, I normally would design for just capacity. After extensive search, I am not able to find anything concrete. It is all over the place, I see some people say “for PF IOPS, design like normal mailbox”, others say “use 10% of user mailbox IOPS”.
Right now I have sized them on 600GB FC drives on RAID 5.