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| syncpoint,commit, and rollback |
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| venkat kurra |
 Posted: Tue Nov 06, 2001 9:48 am Post subject: |
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Master
Joined: 18 Oct 2001
Posts: 245
Location: Bloomington , IL
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Hi,
I have little bit confusition on these syncpoint,commit and rollback.I have MQseries set up on Windows2000 and AS/400. could you please guide me why i need syncpoint and where i can set it.what is about commit and rollback when it may happen?
Thanks,
Venkat |
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| bduncan |
| Posted: Tue Nov 06, 2001 12:29 pm Post subject: |
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Padawan
Joined: 11 Apr 2001
Posts: 1554
Location: Silicon Valley
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Venkat,
I would recommend reading the section in the MQSeries Application Programming Guide on using syncpoint (aka Units of Work) and then downloading a few of the sample programs from the repository that use syncpoint to get a practical knowledge of it. Unfortunately syncpoint isn't one of those issues one can describe in any useful detail in a few lines.
To give you a few tips though, I would mention that syncpointing is handled by your application. In other words, when you do an MQGET or MQPUT and specify the syncpoint option, your application will request the queue manager to begin a new unit of work on its behalf. Additional GETs and PUTs can be added to this unit of work, and at some point, your application must commit (MQCMIT) or backout (MQBACK) this unit of work. When such a command is issued, the queue manager handles the actual movement of the messages.
_________________
Brandon Duncan
IBM Certified MQSeries Specialist
MQSeries.net forum moderator |
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