Hi,today I've learned that the Dell hardware our mail servers run on is out of support, because it's more than 5 years old (time flies ...). We were planning an upgrade from RHEL 3 to RHEL 5 anyway, but now we will try to accelerate that procedure somewhat. Our systems group is pushing VMware ESX on all levels. Previously VMware was not recommended for IO-heavy tasks, but apparently that's not the case anymore. Currently we have an ESX 3.5 environment, but that will be upgraded to ESX 4 by the end of January.
My question is if there have been recent experiences running a Cyrus server with up to 2,500 concurrent IMAP connections under VMware ESX? I've found some posts in the archives, e.g.
<http://cyrusimap.web.cmu.edu/archive/message.php?mailbox=archive.info-cyrus&msg=45854> <http://cyrusimap.web.cmu.edu/archive/message.php?mailbox=archive.info-cyrus&msg=48535>but the former is relatively old, and the latter isn't really answered wrt VMware ...
FWIW, the current setup is a single Dell PowerEdge 6650 with 16 GB of RAM, coupled with a twin using Red Hat Cluster Suite.
Thanks, Sebastian
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