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MQSeries.net Forum Index » Clustering » Moving queue's in and out of a cluster...

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Empeterson
PostPosted: Tue Dec 02, 2003 7:10 am    Post subject: Moving queue's in and out of a cluster... Reply with quote

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Joined: 14 Apr 2003
Posts: 125
Location: Foxboro, MA

Is it ok to move a queue in and out of a cluster on the fly, or are there potential pitfalls with doing that? Will all repositories immediately get updated and notified when a queue is removed from the cluster?
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Empeterson
PostPosted: Tue Dec 02, 2003 8:02 am    Post subject: Reply with quote

Centurion

Joined: 14 Apr 2003
Posts: 125
Location: Foxboro, MA

Or maybe I should just put-inhibit the queue?
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PeterPotkay
PostPosted: Tue Dec 02, 2003 4:22 pm    Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7717

What are you trying to accomplish?
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Peter Potkay
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Empeterson
PostPosted: Thu Dec 04, 2003 12:52 pm    Post subject: Reply with quote

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Joined: 14 Apr 2003
Posts: 125
Location: Foxboro, MA

Basically, we just want to be able to inhibit messages from going to specific queue managers in the cluster. If we put-inhibit one of the queue's, will workload balancing still occur across the remaining queue's in the cluster?
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PeterPotkay
PostPosted: Thu Dec 04, 2003 12:59 pm    Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7717

Yes, that's the correct and easy way to do it. PUT INHIBIT it. No messages will be sent to it (it gets removed from the round robin), but all other queues function normally.
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mqdev
PostPosted: Tue Dec 09, 2003 1:40 pm    Post subject: Cluster changes crash the Full Repos boxes Reply with quote

Centurion

Joined: 21 Jan 2003
Posts: 136

We have a huge MQ cluster (1000+ QMgrs) implemented in production. We had bad experiences with adding cluster queues (what we were attempting was basically we had 2 instances of a group of cluster queues - we were adding a 3rd instance of the same queues to balance load and other accomplish other tasks...). The Full Repo boxes just ran out of paging space (our env is: AIX 5.2, 4.3 with MQ v5.3 throughout the cluster).

Moral of the story: When attempting cluster updates (esp in large clusters) which are likely to be propagated to the whole cluster, ensure that the Full Repo boxes have enough resources (memory, cpu etc) to handle the updates.
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