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MQSeries.net Forum Index » General IBM MQ Support » Load balancing MQ Clients

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vshankar001
PostPosted: Mon Nov 03, 2008 11:34 am    Post subject: Load balancing MQ Clients Reply with quote

Newbie

Joined: 06 Feb 2003
Posts: 3
Hi:

I am wondering how to best go about designing this. I have a QM with a Queue defined on which two client applications are listening using the MQ Client. I'd like to load balance the messages across the two say 80% of messages get pulled by the first and 20% by the second. How would I do this using native MQ functionality without having to write something custom? Is anything even available out of the box? My goal is to not change the application putting the message if at all possible.

Any ideas will be much appreciated. I tried to find something about this on the forum but was unsuccessful.

Thanks.
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PeterPotkay
PostPosted: Mon Nov 03, 2008 12:02 pm    Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7722
Not possible out of the box.

The MQ Clients will pull as fast as they can. They will race for each message assuming both are ready. There is no guarantee to the % each will win at the end of the day.

If you're app processed 1 message a second, and 1 message a minute arrived, its entirely possible that at the end of the day they each did 50%, or one did 100%.

As soon as queueing occurs, the load will become 50/50, assuming they perform eqally.
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Peter Potkay
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vshankar001
PostPosted: Thu Nov 13, 2008 10:21 am    Post subject: Reply with quote

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Joined: 06 Feb 2003
Posts: 3
Thanks much!
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