I apologize, but after searching and coming up a bit light (and being a ZimNewbie), I need info for sizing new server farm (especially given the new release!).
The existing posts from last year reference setups on single core, dual processor servers w/ 2Gb RAM and > 80Gb RAID 0+1 storage, but really don't give expected throughput or account load figures to go with that configuration.
Can anyone give me an idea of the hardware requirements for say a 1000 user system w/ 500Mb avg mailbox, and 50 Message units/day? I should be able to scale from there.
As an alternative, is there a recommended load testing tool we might use to stress the system? We have a Single Processor, Dual Core Opteron system, w/ 4Gb RAM and 600Gb SATAII RAID array set to test, but we need stress info early.
With the Network Edition we can supply some load tools under NDA. In general we don't release those. You should be able to support those 1000 users on a dual cpu 2gig RAM machine. In general you want to oversize to handle peaks so it might be a slight overkill but better to be over than under with sizing.
It will also depend on access. IMAP is more chatty than POP for example, and Outlook/Web UI would be less load on the system than say IMAP. Also depends if this is an office type environment where you have say a heavy peak at 9am when everybody gets in and checks their mail from the night before.