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| Removing full repository and cluster channels from cluster |
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| ZK99TOE |
 Posted: Thu Nov 16, 2017 5:26 pm Post subject: Removing full repository and cluster channels from cluster |
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Newbie
Joined: 04 Sep 2013
Posts: 7
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I'm following "Task 9: Removing a cluster network"
http://publibfp.boulder.ibm.com/epubs/html/csqzah06/csqzah06tfrm.htm
I have two queue managers, QM1 & QM2, that are currently full repositories for cluster TEST. I am removing the TEST cluster from QM1 & QM2.
QM1 & QM2 are also full repositories for a new and improved cluster, which is why TEST is being removed.
I'm trying to understand why both QM1 CLUSSDR and CLUSRCVR get removed before CLUSSDR and CLUSRCVR are removed from QM2.
I would have thought I should remove CLUSSDR from both QM1 & QM2 and then both CLUSRVCRs.
Is it because I will already have spaced out the REPOS attribute on both queue managers, so as partial repositories QM1 & QM2 won't be supplying information to each other?
thanks... |
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| PeterPotkay |
| Posted: Thu Nov 16, 2017 6:39 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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That link you posted is from 15 years ago, for a version of MQ that has been out of support for many, many years.
Here is a link to the steps for MQ 7.5, the oldest version of MQ currently supported:
https://www.ibm.com/support/knowledgecenter/SSFKSJ_7.5.0/com.ibm.mq.con.doc/q017500_.htm
Consider a cluster with 1000 QMs. If you were breaking this cluster down, you would remove one QM at a time, removing the cluster channels in the order and manner described. One QM at a time. When you had only 2 QMs left in the cluster, you would still perform the cluster channel steps on only one QM at a time.
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Peter Potkay
Keep Calm and MQ On |
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| ZK99TOE |
| Posted: Mon Dec 04, 2017 10:54 pm Post subject: |
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Newbie
Joined: 04 Sep 2013
Posts: 7
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Thanks for the updated link.
I’m trying to understand the difference between what happens to the two queue managers when removed as full repositories, vs. removing a queue manager from a cluster (which I have done many times).
The cluster is being deleted, so there won’t be a full respository after I’m done.
For removing the queue manager from a full repository, after removing the REPOS value from the queue manager, I remove the CLUSTER value of a CLUSSDR first rather than the CLUSRCVR.
1) Why the CLUSSDR from the cluster first – does the QM2 CLUSRCVR create a CLUSSDRA on QM1?
2) How do the cluster channels on QM2 ‘respond’ when when both QM1's CLUSSDR and CLUSRCVR removed from the cluster?
3) Does the QM2 CLUSRCVR still communicate QM1 with based on QM2’s locally held cached information?
4) What is critical about the order in which the channels are removed from the cluster? |
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| bruce2359 |
| Posted: Tue Dec 05, 2017 4:58 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| ZK99TOE wrote: |
4) What is critical about the order in which the channels are removed from the cluster? |
What is critical is that the order of events is documented and fully supported by IBM, and it works.
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