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| CLWL use queue |
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| mqjeff |
 Posted: Thu Apr 09, 2009 7:44 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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If there is only one L1, then it doesn't matter what CLWLUSEQ is set to.
If there is more than one L1 on multiple qmgrs, it gets more complicated than it appears you think if CLWLUSEQ is different. |
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| bruce2359 |
| Posted: Thu Apr 09, 2009 8:13 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9472
Location: US: west coast, almost. Otherwise, enroute.
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From your original post:
| Quote: |
| If we set CLWLUSEQ paratmeter as 'Local' on a queue or a queue manager, then the messages will deliver to local instance (local to application) of queue. |
For the CLWLUSEQ attribute to take effect, there must be a local instance of a queue AND at least one remote cluster queue instance.
If you specify CLWLUSEQ(QMGR) is specified, the behavior is as specified by the CLWLUSEQ parameter of the queue manager definition.
If you specify CLWLUSEQ(ANY), the qmgr treats the local queue as another instance of the cluster queue for distribution.
For CLWLUSEQ(LOCAL) the local queue will be the only target of the MQPUT.
| Quote: |
| Question is, if the application wants to put message in local queue then what is the need to define a queue (with same name and shared to cluster) on another queue manager under same cluster? The application will never use the cluster instance of local queue. |
First, the application doesn't get to decide, the system administrator sets the attributes for all applications use of the queue. Once you set the CLUSTER attribute of a queue, you are telling the qmgr that there might be multiple instances of the resolved qname. See above.
| Quote: |
| And if we have to use default value i.e. 'any' at queue manager or queue level, then what is the use of this property? |
To tell the qmgr clustering distribution software how to go about distributing messages for this queue. See above.
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ב''ה
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| sumit |
| Posted: Thu Apr 09, 2009 8:42 am Post subject: |
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Partisan
Joined: 19 Jan 2006
Posts: 398
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Indeed a helpful post. 
In links and docs, I read the same definition many times. But when I was reading your post, I got a different and clearer perspective of CLWLUSEQ property.
Thanks bruce2359 for presenting the definition this way. I can sleep happily now. 
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Sumit |
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