I have a box that runs about 120k users that is not far off the spec that you have below. The main differences are I guess: We only have the two domains on that box We use messagelabs to scan for viruses both in and out so we only talk to a limited number of SMTP servers We use a SQL Server database ( on a separate machine) to authenticate against. We use a 200GB RAID 1 + 0 drive for the mailboxes and a separate RAID 1+0 drive for the spool directory. We don't run the anti spam filtering with in Imail.
We currently run at about 100k inbound messages a day and up to 4000 unique users an hour and the cpu ticks over at an average of about 30% on all four processors. We do, however, occasionally see spikes up to the high 90 / 100%. Once or twice a day which last for about 30 seconds to a couple a minutes. Usage patterns vary etc but I would have thought that your box would do the trick though I would question the use of RAID 0 - surely you would want some resilience? Oh yeah on the performance level if you think most of your customers are going to be using webmail then we found that IIS does a better job of serving images than the webmail service - so put all the webmail images on IIS and hack the web skins to point to IIS. Regards, Pat -----Original Message----- From: Ed Butler (49pence) [mailto:[EMAIL PROTECTED] Sent: 04 May 2004 09:46 To: [EMAIL PROTECTED] Subject: RE: [IMail Forum] Capacity Planning for Imail? I would be interested to see a reply to this thread, as yet there have been none. Any volunteers? Regards, Ed Butler 49pence.com - The Web Hosting Specialists 0870 141 7149 ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Young, Kip W Sent: 03 May 2004 20:33 To: [EMAIL PROTECTED] Subject: [IMail Forum] Capacity Planning for Imail? Hello all, I'm currently tasked with hosting email for approximately 125,000 users across roughly 5000+ domains in the near future. Is anyone out there hosting this amount of users/domains using IMail? If so what are the machine specs that you currently use? One note, we are utilizing 2 servers as smtp gateways for offloading Virus and Spam processing. We aren't tightly filtering the spam so a lot of it will get past the gateways. Here are the specs we currently have for an ednpoint mail server: 4 Proc 2.0 Ghz Xeon (hyper-threading available) 4GB of RAM 5 X 72GB in RAID 0 Windows 2003 Standard Edition Dual Intel Pro 100/S teamed NICS Webmail will be used pretty heavily with the KillerWebMail templates. There is also a high probability that at least 20%-30% of the 125,000 users are stale accounts that are no longer being used. If anyone has tips on identifying stale users other than the Dir commands in dos that would be awesome. Thanks in advance for the help! Kip Young, MCSE - Manager of Network Operations Reynolds Web Solutions 214-239-4131 To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
