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dzifchock · Posted: Tue Jun 10, 2008 7:44 am Post subject: VirtualIP/Loadbalancer + Failover

I've been tasked with implementing mq failover. I've been reading up on using virtual ip's etc on some of the HA presentations and the HA support pac, and have found mixed information on do NOT use a virtual IP and it is ok to use a virtual IP for MCA channels.

My env is MQ 6.0.2.2 on HPUX11.11

I do not want to use any sort of clustering software and would rather handle it using VIP's, load balancer, and an active/inactive queue manager setup using network attached storage to store /var/mqm/qmgrs and /var/mqm/logs. I can take a little bit of downtime so either scripting the startup of the 2nd node or having a little manual intervention is ok.

If I have a virtual IP, cname host.com to it through DNS, and setup a server farm having the 2 servers nfs mounting the storage (one being active and one being backup, only one running at a time) will my connecting sender MCA channels have issues connecting from one to the other as long as I use host.com in the CONNNAME?

Also, will I run into problems if I have a sender channel on the active/backup queue manager connecting to a receiver since the CONNAME will most likely be coming from the server and not the VIP? Could this be fixed by making a local hosts entry for host.com on each server?