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MQ cluster load balancer question

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mgm

Posted: Sun Jun 07, 2009 3:45 am Post subject: MQ cluster load balancer question

Apprentice

Joined: 14 Dec 2007
Posts: 48
Location: anywhere

Hi,
I have MB flow that put messages to a local queue and expect reply from another local queue.
The queue manager was clustered with another queue manager and both queue were announced as shared.
So I have for example QM1 and QM2 each has two local queues shared in the same cluster. the clwluseq is set to any for QM1 and QM2 and DEFBIND(NOTFIXED) for the local queues.

My question is: When the flow puts a message it might go either to the local queue on QM1 or QM2 as round robin. But the reply message can't be read the same way. I need to get the message from the same queue manager that got the input message. Appreciate your help.

Vitor

Posted: Sun Jun 07, 2009 4:45 am Post subject: Re: MQ cluster load balancer question

Grand High Poobah

Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA

mgm wrote:

I need to get the message from the same queue manager that got the input message. Appreciate your help.

If whatever's generating the reply message is using the Reply values in the MQMD (as it should if it's following best practice, and you've followed best practice by setting the message type to Request) then the reply message will go wherever the request message says it should. By default this is the queue manager where the request was sent from.

Read the WMQ documentation for an explaination of this; don't be confused by the fact it's a WMB flow putting the message. In this context, WMB is just an application putting a message and the normal WMQ rules apply.
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