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| Round Robin - Not Working |
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| JD996 |
 Posted: Wed Oct 21, 2009 11:11 pm Post subject: |
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Newbie
Joined: 20 Oct 2009
Posts: 6
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thanks guys, you rock! the qmgr alias worked a treat! round robin is now working sweet as!
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| jonesn |
| Posted: Thu Jan 21, 2010 2:31 pm Post subject: |
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Apprentice
Joined: 09 Jan 2002
Posts: 47
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Chaps,
I have the following scenario which is very similar to this post.
We have three queue managers in the cluster QM1, QM2 & QM3. Two queue managers (QM1 & QM2) host a cluster queue called FRED. Both instances of FRED are DEFBIND(NOTFIXED) and when putting to FRED from QM3 the messages are load balanced as you wold expect.
But we need to authenticate on QM3 using OAM so we created a QALIAS on QM3 called TO.FRED. This has a blank cluster and clusnl attributes but DEFBIND(OPEN).
When we put to TO.FRED on QM3 the messages do not load balance. If we change TO.FRED to DEFBIND(NOTFIXED) the messages load balance.
I thought that DEFBIND is ONLY used when cluster or clusnl is set but this suggests a hidden use.
Though we now have a working, load balancing solution I am conerned that I am using a feature that may be fixed in the future.
Does anyone have any comments on this?
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Nick Jones
IBM Certified Solutions Expert (WebSphere MQ Integrator) |
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| PeterPotkay |
| Posted: Thu Jan 21, 2010 5:31 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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Your Queue Alias needs to be Bind Not Fixed. This is documented somewhere in the manuals. Same thing applies to this parm on Remote Q defs.
Think of it this way -this setting is locked in on the MQOPEN call. If you are opening a local cluster queue, or an Alias queue, or a remote queue, that's queue's default value will be used if you don't explicitly set your own value on the MQOPEN or MQPUT1.
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Peter Potkay
Keep Calm and MQ On |
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| jonesn |
| Posted: Fri Jan 22, 2010 1:15 am Post subject: |
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Apprentice
Joined: 09 Jan 2002
Posts: 47
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So Peter the DEFBIND attribute is used whether the cluster & clusnl attributes are set or not?
Do you think this is a feature or something that was designed into the product?
Thanks
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Nick Jones
IBM Certified Solutions Expert (WebSphere MQ Integrator) |
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| PeterPotkay |
| Posted: Fri Jan 22, 2010 4:54 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| jonesn wrote: |
So Peter the DEFBIND attribute is used whether the cluster & clusnl attributes are set or not?
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Yes. If you are opening an Alias Q or a Remote Q that resolves to a clustered local queue.
In this link
http://publib.boulder.ibm.com/infocenter/wmqv7/v7r0/topic/com.ibm.mq.csqzal.doc/fg10990_.htm
it talks about how the Alias Queue's properties are used in favor of the Base Q. You can have 1 Base Q with 5 Alias queues resolving to it, and each of the 5 Aliases can have different settings to get 5 different results. They don't call out the Bind option specifically, but in this context its the same as Def Persistence, Def Priority, Put Enabled, etc.
Your test results seem to confirm that.
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Peter Potkay
Keep Calm and MQ On |
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