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MQSeries.net Forum Index » General IBM MQ Support » how BACKOUT works

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sebastia
PostPosted: Sat Jun 24, 2006 9:56 am    Post subject: how BACKOUT works Reply with quote

Grand Master

Joined: 07 Oct 2004
Posts: 1003
I thought BACKOUT mechanism was provided by MQ,
and it was MQ that was moving the message to the Backout queue
when the limit was reached at using MQBACK() ...

Now, in "BACKOUT.C" sample from

>>> http://www-304.ibm.com/jct09002c/isv/tech/sampmq.html

... I see I have to move the message manually !?!?!?

Can someone provide a pointer to any book saying
that it has to be my code that moves the message
to the Backout Queue ???

Thanks.

Also I dont understand why it has to be a LOCAL queue ...
Why if I want to send to a Remote Queue Manager ?

+++++++++++++++++++++++++++++++++++++

All I have found is ... this :

MQ manual says (DEFINE QLOCAL at MQSC command ref) :

+++++++++++++++++++++++++++++++++++++
BOTHRESH(integer)
The backout threshold.
This parameter is supported only on local and model queues.
Apart from maintaining a value for this parameter, the queue manager
takes no action based on its value.
+++++++++++++++++++++++++++++++++++++
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PeterPotkay
PostPosted: Sat Jun 24, 2006 10:57 am    Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7722
http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/topic/com.ibm.mq.csqzak.doc/js02900.htm?resultof=%22%62%61%63%6b%6f%75%74%22%20

Quote:

This is the excessive backout requeue queue name. Apart from allowing its value to be queried, the queue manager takes no action based on the value of this attribute.


The Info Center is your friend. Get to know him:
http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/index.jsp


It doesn't have to be a local queue. But only local queues have an attribute called BackoutRequeueQName that you have to find the value of and then use. That q name could be a remote q, or an alias queue, or a cluster queue.
_________________
Peter Potkay
Keep Calm and MQ On
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wschutz
PostPosted: Sat Jun 24, 2006 11:06 am    Post subject: Reply with quote

Jedi Knight

Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
PeterPotkay wrote:
http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/topic/com.ibm.mq.csqzak.doc/js02900.htm?resultof=%22%62%61%63%6b%6f%75%74%22%20
Quote:

This is the excessive backout requeue queue name. Apart from allowing its value to be queried, the queue manager takes no action based on the value of this attribute.

Well, almost... there is JMS:
http://www.mqseries.net/phpBB2/viewtopic.php?t=27815&highlight=bothresh
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