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| sahaja |
 Posted: Fri Nov 06, 2009 1:17 am Post subject: what happens when you issue SUSPEND QM? |
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Newbie
Joined: 29 Oct 2009
Posts: 1
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| What exactly happens when you issue SUSPEND QM |
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| AkankshA |
| Posted: Fri Nov 06, 2009 1:23 am Post subject: |
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Grand Master
Joined: 12 Jan 2006
Posts: 1494
Location: Singapore
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hello
when u issue a suspend qm command, the queue manager gets suspended from cluster
that means all the other queue managers of the cluster gets the information that the local queue manager(supended one) is not available for processing, and cannot be sent messages.
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| exerk |
| Posted: Fri Nov 06, 2009 2:10 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| AkankshA wrote: |
| ...that means all the other queue managers of the cluster gets the information that the local queue manager(supended one) is not available for processing, and cannot be sent messages. |
Caveat: unless it hosts the only available 'target' queue, even in its suspended state.
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| PeterPotkay |
| Posted: Fri Nov 06, 2009 3:23 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7717
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Or the message is specifically addressed to the suspended QM.
What exactly happens when you suspend a QM? Exactly what the MQ Cluster manual says happens.
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Peter Potkay
Keep Calm and MQ On |
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| bruce2359 |
| Posted: Fri Nov 06, 2009 6:15 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9396
Location: US: west coast, almost. Otherwise, enroute.
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Another caveat: if an application already has a cluster queue open when the qmgr is suspended, it will continue to put messages to the cluster queue of the now-suspended qmgr. Subsequent mqopens will not discover the suspended qmgrs cluster queues.
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Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| fjb_saper |
| Posted: Fri Nov 06, 2009 3:48 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20696
Location: LI,NY
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| bruce2359 wrote: |
| Another caveat: if an application already has a cluster queue open when the qmgr is suspended, it will continue to put messages to the cluster queue of the now-suspended qmgr. Subsequent mqopens will not discover the suspended qmgrs cluster queues. |
This behavior is typical for a "bind on open" open mode. A "bind not fixed" open mode should recognize the qmgr being suspended and behave accordingly. 
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| bruce2359 |
| Posted: Fri Nov 06, 2009 5:35 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9396
Location: US: west coast, almost. Otherwise, enroute.
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| A "bind not fixed" open mode should recognize the qmgr being suspended and behave accordingly. |
Hmmmm. My thinking (no empirical evidence) is no. Once bound to a queue, puts will go to that queue until it becomes unavailable - queue put-inhibited or closed. The next open would not discover a suspended qmgrs queues.
Seems like a test is in order.
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ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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