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MQSeries.net Forum Index » General Discussion » MQ High Availability cluster

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pmane
PostPosted: Tue Aug 27, 2002 5:40 pm    Post subject: MQ High Availability cluster Reply with quote

Acolyte

Joined: 17 Oct 2001
Posts: 50
Hi
we are using MQ on two machines in vertas cluster. One is back up and other is primary. An AS/400 is connected to this cluster. What we want is if the one machine running MQ goes down then the other machine will take over automaticaly.
Good news is veritas will do that for us but bad news is MQ messages on the failed server are lost for ever. what I need to make sure that can both the MQ managers exchange a hartbeat with each other and if one fails then other takes over automaticaly. More over it keeps replicating local queues on both the machines automaticaly ? Dose such High availability cluster on MQ provided by some one ? . I do not want a load balancing function that is given by MQ Cluster as in that case both machine will be working.
Thanks
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TonyD
PostPosted: Tue Aug 27, 2002 6:08 pm    Post subject: Reply with quote

Knight

Joined: 15 May 2001
Posts: 540
Location: New Zealand
I am surprised that you say 'MQ messages on the failed server are lost for ever'. The two queue managers (primary, alternate) should access the same log files and the same queue files. If messages are processed under syncpoint on the primary queue manager , any 'in-flight' (i.e. uncommitted) messages at the time of failure should be restored as part of the recovery/restart processing for the alternate queue manager when the automatic fail-over takes place. No messages therefore should be lost. Does this not happen when using Veritas? Also, I would have expected that the Veritas implementation includes 'heartbeat' detection over the private ethernet.
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pmane
PostPosted: Wed Sep 04, 2002 4:23 am    Post subject: Reply with quote

Acolyte

Joined: 17 Oct 2001
Posts: 50
I got a support pack from IBM on this topic.
Below is the link
http://www-3.ibm.com/software/ts/mqseries/txppacs/mc6a.html\
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