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| Global Unit of Work |
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| Rangarajan |
 Posted: Tue Jul 29, 2003 9:07 pm Post subject: Global Unit of Work |
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Novice
Joined: 01 Aug 2002
Posts: 22
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I went through the system administration guide to get a feel of Global unit of work.
Iam not able to clearly understand the need for Global Unit of Work.
Can anyone please help me on this.
thanx in advance
Rangarajan |
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| mqonnet |
| Posted: Wed Jul 30, 2003 5:08 am Post subject: |
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Grand Master
Joined: 18 Feb 2002
Posts: 1114
Location: Boston, Ma, Usa.
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Global UOW usually includes external participants. Such as retreiving a record from the DB and putting it on a queue needs to be co-ordinated within a UOW. In this case, either the Qmgr can act as the co-ordinator and hence managing the UOW and commits, or it can act as a participant and just accept orders from an external co-ordinator.
As opposed to Local UOW which includes only MQ as the sole participant.
Hope this helps. :)
Cheers
Kumar |
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| bower5932 |
| Posted: Wed Jul 30, 2003 6:43 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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The best example of a global UOW that I've seen is in the banking industry. You put a message that contains either a deposit or a withdrawal from an account. You want this message and the DB update of the deposit/withdrawal to be done together (ie, global UOW). If you try this with 2 local units of work, you could end up with only part of the work getting done. There are some global UOW samples on this site and there are also some on:
http://www.developer.ibm.com/tech/sampmq.html |
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