DRBD Cluster
As "previously reported":http://blog.fupps.com/2005/11/04/high-availability/, we are in the process of setting up a highly-available e-mail cluster for several hundred users. I've already chosen the software ("Exim":http://www.exim.org, "Dovecot":http://www.dovecot.org, "OpenLDAP":http://www.openldap.org and "DRBD":http://www.drbd.org) and am now in the process of getting the configuration right. _Heartbeat_ is functional and switches the packages over nicely and _DRBD_ does _exactly_ what we want it to.
Jan-Piet Mens » Ready for Production wrote on 04-Jul-06 at 1:25 pm
[...] The mail server for 500 users I mentioned recently is ready to rumble. It runs on CentOS 4.2 and uses DRBD to replicate a 500 Gig file system from a master to a hot-standby machine. These two are crosslinked with Gigabit Ethernet. heartbeat uses that same link as well as a dedicated serial link to ensure timely failover in case the primary system goes down. So far, I am very pleased with both the performance and stability of DRBD indeed. [...]