> I'm looking at a poor man's HA setup for CAS using DNS RR load balancing > with two CAS servers which store tickets in a MSSQL DB backend.
A poor man can do a lot better than round-robin DNS for a HA setup. I'd argue that round-robin DNS has few of the properties of a true HA environment. The primary liability that comes to mind is that it relies on client DNS cache settings in order to trigger failover; typical client DNS cache settings are typically on the order of minutes to hours IIRC, so a node failure will likely generate as many help tickets as no RR at all. As an alternative, I'd strongly recommend you check out http://www.linuxvirtualserver.org/. If you're familiar with iptables, then ipvsadm will seem immediately familiar. Paired with keepalived, you can get a capable HA setup going with only a couple days worth of setup time and the cost of one additional Linux box. I was quite impressed with the functionality. I can share my configs if that would help. M -- You are currently subscribed to [email protected] as: [email protected] To unsubscribe, change settings or access archives, see http://www.ja-sig.org/wiki/display/JSG/cas-user
