On Wed, 19 Mar 2003, Mike Lohmann wrote: > I've got 20000 users writing about 2 mails/day, whereby one mail has approx. > 100KB.
Looks like a spike-driven problem. > What will be, in your opinion, the estimated memory- and cpu usage per user, > when 100 of them send their mails at the same time? Test it. It is very dependent on your platform of choice, and the way you set it up. I'd start testing with 512MB RAM, and a dual PIII system for that load, but that's a crude guess. BTW, proper IO is important, so go for SCSI3-160 disks. > (Is there a document which tells me what cyrus 'costs'?) No, that would be pointless. If one is to check wether a system will work for him, he is to do it right and *test* it. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh
