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| z/OS - how to force segmentation |
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| sumithar |
 Posted: Tue May 12, 2009 1:03 pm Post subject: z/OS - how to force segmentation |
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Apprentice
Joined: 13 Jun 2008
Posts: 47
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I'm writing a batch program with Ent Cobol on z/OS. My queue manager is set up as having max message length of 100MB.
I created a message 1 byte > 4MB in length like so
| Code: |
01 MQ-BUFFER.
03 MQ-DATA PIC X(1) OCCURS 4194305 TIMES
INDEXED BY MQ-INDX
value 'A'.
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and I set the flags and executed the put as follows
| Code: |
COMPUTE MQMD-MSGFLAGS = MQMF-NONE +
MQMF-SEGMENTATION-ALLOWED +
MQMF-SEGMENT
COMPUTE MQPMO-OPTIONS = MQPMO-NONE +
MQPMO-SYNCPOINT +
MQPMO-FAIL-IF-QUIESCING
MOVE 'MQPUT ' TO WS-MQ-ERROR-TYPE
CALL MQPUT USING WS-MQ-HCONN
WS-MQ-HOBJ
MQMD
MQPMO
WS-MQ-BUF-LEN
MQ-BUFFER
WS-MQ-CC
WS-MQ-RC
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I get a return code of 2030 from the PUT, which I understand is message too big.
It works fine if the size is 4194304
now the app prog guide says segmentation is not supported on z/OS. So my first question is why the flag values are made available at all?
Also, what's the work around if I want to PUT a message > 4 MB
Thanks! |
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| Vitor |
| Posted: Tue May 12, 2009 1:21 pm Post subject: Re: z/OS - how to force segmentation |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| sumithar wrote: |
| now the app prog guide says segmentation is not supported on z/OS. So my first question is why the flag values are made available at all? |
Well according to this part of the app prog ref:
| Quote: |
On z/OS, the queue manager does not support the segmentation of messages. If a message is too big for the queue, the MQPUT or MQPUT1 call fails with reason code MQRC_MSG_TOO_BIG_FOR_Q. However, the MQMF_SEGMENTATION_ALLOWED option can still be specified, and allows the message to be segmented at a remote queue manager.
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| sumithar wrote: |
| what's the work around if I want to PUT a message > 4 MB |
I'd make sure the all the queues have their limits increased to 100Mb, along with all the other WMQ objects your put will invoke.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| sumithar |
| Posted: Tue May 12, 2009 2:03 pm Post subject: |
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Apprentice
Joined: 13 Jun 2008
Posts: 47
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| Thanks- I will bring that up with the MQ Admin folks! |
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| bruce2359 |
| Posted: Tue May 12, 2009 6:40 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| Quote: |
| why the flag values are made available at all? |
Consistency. Evolution.
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