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| koko |
 Posted: Wed Nov 30, 2005 4:53 pm Post subject: Disabling Round Robin at mq level |
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Master
Joined: 26 Sep 2003
Posts: 206
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I have a unique problem. This topic involves both mq and workflow. Since I am not getting proper response from workflow forum, I am posting my question here.
I have a scenario where there are three qmanagers QM1, QM2 an QM3. QM1 and QM2 are hosting workflow servers. QM3 is hosting Websphere Application Server ( client concentrator ). QM1 and QM2 have full repositories.
We dont have access to the application code ( Its IBM propreitery ) where WAS opens up queues on QM3.
Whats happening is when ever we try to interact with GUI on WAS, it is sending messages in a round robin fashion to QM1 and QM2. I dont want it to work that way. I would like WAS to send all the messages to QM1 only. I repeat here that at the top most application level we do not have access to change any options while talking to QM3.
Is there any trick I can use to let all the messages go to QM1 alone.
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Thanks
Koko |
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| jefflowrey |
| Posted: Wed Nov 30, 2005 5:05 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Put disable the queue on QM2.
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| PeterPotkay |
| Posted: Wed Nov 30, 2005 6:12 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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Uncluster the queue on QM2.
-or-
Delete the queue on QM2.
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Peter Potkay
Keep Calm and MQ On |
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| hopsala |
| Posted: Wed Nov 30, 2005 6:50 pm Post subject: |
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Guardian
Joined: 24 Sep 2004
Posts: 960
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If you wish to keep the queue in QM2 available for other purposes, and you have WMQ v6 you can set CLWLPRTY parm of said queue (or even CLWLRANK) to a lower priority.
You cannot, however, by any means other than creating two clusters, have WAS send only to QM1 while other appls on the cluster send to both QM1 and QM2 (this regarding the same queue, of course).
Btw, I don't know Workflow at all, but my guess is there's a better solution on that level, rather than the WMQ network level; A BIND_ON_OPEN parallel is bound to be somewhere. |
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| jefflowrey |
| Posted: Wed Nov 30, 2005 7:13 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| hopsala wrote: |
| Btw, I don't know Workflow at all, but my guess is there's a better solution on that level, rather than the WMQ network level; A BIND_ON_OPEN parallel is bound to be somewhere. |
It's actually WAS that's opening the queue for output, not workflow, at least according to the first post.
So I'd guess that it's either something in Process Choreographer/Server, or it's JMS. If it's JMS, then there's definitely an option on the Queue Destination for setting BIND_NOT_FIXED or BIND_ON_OPEN (but you know that, I think...).
If it's PC/PS, then I'm pretty sure there's an option. But I don't remember for PC and I haven't seen PS.
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| fjb_saper |
| Posted: Thu Dec 01, 2005 2:29 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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If it is indeed WAS the easiest thing to do is change the JNDI to explicitly ask for the queue on QM1.
Instead of binding the JNDI to the queue name in standard fashion, specify the qmgr name:
queue://QM1/MY.CLUSTERED.QUEUE?myoption1=value&myoption2=value...
That should pretty much guarantee that you hit only the queue on QM1.
No change to the program, no change to MQ.
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| koko |
| Posted: Thu Dec 01, 2005 10:06 am Post subject: |
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Master
Joined: 26 Sep 2003
Posts: 206
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Thanks a bunch for all your suggestions.
QM1 and QM2 have to be in same cluster
QM2 and QM3 have to be in same cliuster
So QM2 cannot be unclustered.
The queue in question cannot be disabled as its a two way queue. Both WAS and Workflow use it.
Bottom Line I think I am screwed 
I will open a ticket with IBM and try to post a solution once I find it.
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| PeterPotkay |
| Posted: Thu Dec 01, 2005 4:43 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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QM1 and QM2 are in CLUSTERA?
QM2 and QM3 are in CLUSTERB?
so QM2 is in both CLUSTER1 and CLUSTER2?
Or are QM1, QM2 and QM3 in the same cluster?
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Peter Potkay
Keep Calm and MQ On |
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