> I just got a call from someone wanting to be able to send 50k email > messages a second. Most of it in bursts of a few seconds long. It has to > do with some kind of gaming application. I'm just trying to picture in > my mind what kind of hardware could do that.
I have an Directadmin based email/web server. Its based on CentOS 32bit 4.4, Exim, Dovecot, Spamassassin-3.2.4, Clamav and etc. Maildir based. Hardware is: AMD64 Dualcore 3800+ just updated to 5600+ 4Gbyte DDR2 SATA2 500GB drive Normally load average is like 8 or less but at peak times I am seeing it spike to like 100 area. Upgrading the CPU gained very little. I am thinking I am disk I/O bottle necked. I have about 2000 email accounts and according to eximstats at peak times I am seeing "Messages received per hour" of 40K. I have added a few scripts hoping they would help. I now auto suspend email accounts that have not been checked in 6 months. Few other scripts for cleaning out old high scoring spam from mailboxes infrequently checked. Also bounce based on a few blacklists at MTA time. Cannot be too aggressive there else users complain. Spamassassin does a very good job. Very rarely does a false positive but does let some SPAM slip by. Any other ideas to speed it up at peak times? Hopefully without starting from scratch with crud load of downtime. I wander if the SATA feature of NCQ would speed the disk I/O up but there is likely no easy way to upgrade CentOS 4.x to do that. Matt -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
