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| synchpoint and message arrival |
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| psanders |
 Posted: Mon Jul 26, 2004 10:59 am Post subject: synchpoint and message arrival |
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Apprentice
Joined: 02 Apr 2002
Posts: 27
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Given that I put several messages to a remote queue within a single unit of work. Will the messages all be committed to the target local queue within a unit of work or will some of the messages be available before others. I am guessing that the MTA will do as he sees fit and there is no guarantee that the messages will arrive together.
Assuming my guess is correct, are there any message options that can be used to easily alter this behavior? |
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| fjb_saper |
| Posted: Mon Jul 26, 2004 11:19 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Use your own private channel and tailor it in such a way that the channel batch size is a little bit greater than the max messages in a single commit.
That should do the trick
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| PeterPotkay |
| Posted: Mon Jul 26, 2004 3:56 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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In addition, the channel speed will have to be set to NORMAL if these are non persistent (NP) messages. Otherwise, on a FAST channel, NP messages are fire and forget, and the sending MCA will send them over outside of syncpoint one by one.
If they are persistent, channel speed is not an issue in this regard.
The other option is to use Message Groups, if the other side wil take care to specify options that only retrieve the messages when ALL the messages in the group have arrived.
But you might want to reconsider your design so that this is not a requirement. MQ guarantees that the message WILL be delivered. It does not guarantee WHEN it will be delivered.
_________________
Peter Potkay
Keep Calm and MQ On |
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