We currently have a single IMAP server and we are considering two Solaris 8/9 HA Cyrus configurations:
#1. IMAP Aggregator (murder)
#2. Cyrus on a Veritas cluster (common file system with parallel service groups)
After looking at the murder design, it seems to me that it's a lot more complicated than having a Veritas cluster and simply running imapd and an MTA on each cluster member, because with the murder configuration, you probably have to end up with a load-balancing switch in front of murder front-end machines which in turn are in front of the backend mailstore machines. mupdate has to be run and mail delivery has to be directed to the correct machine, etc. Moreover, with the murder design, backend machines would have to be clustered anyway (2-node clusters probably) to eliminate the back-end machines as SPOFs.
With a cluster configuration, all machines would run sendmail and master/imapd and offer exactly the same service. A load-balancing switch is in front of the cluster and any cluster machine can go down without losing any service. I can't see any functionality that would be lost but I'm pretty sure that the cluster solution will be more expensive even though the expense of buying murder front-end machines would be eliminated.
So, my first question is: has anyone implemented a Veritas-based Cyrus service?
And my second question is: is there something I'm missing with regard to the Veritas cluster being a much simpler configuration to troubleshoot and operate and a much stronger configuration in terms of availability?
TIA for all input.
Ben Carter University of Pittsburgh/CSSD [EMAIL PROTECTED] 412-624-6470
