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| Cobol buffer size to read 100MB message |
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| tjfunny1 |
 Posted: Fri Nov 15, 2002 1:13 pm Post subject: Cobol buffer size to read 100MB message |
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Apprentice
Joined: 17 Jun 2002
Posts: 35
Location: Atlanta
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This is ugly, but according to IBM docs, you can put a 100 megabyte message on a queue on the OS/390. My question is how can you read it with a Cobol program?? While our program requirements are much smaller than 100mb, we do need capacity to read/process up to a 4mb message.
I've been told you can use the 'Occurs' call to handle large units of data, but I haven't seen any sample code using MQ to read a LARGE message like this.
Has anyone out there done this? Can you forward a copy of the code to build the buffer/working storage area?
Kudos to the expert programmer (I have an opening for you here).
TJ |
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| nimconsult |
| Posted: Sun Nov 17, 2002 11:22 pm Post subject: |
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Master
Joined: 22 May 2002
Posts: 268
Location: NIMCONSULT - Belgium
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That is a LONG time ago for me, but I personally used dynamic memory allocation instead of hard-coding an array in the COBOL program.
First allocate memory (using a language environment call CEEGTST if I remember well, or EXEC CICS GETMAIN, which is equivalent if you work with CICS) and set it to MY-BUFFER-POINTER.
Then you perform "SET ADDRESS OF MY-BUFFER TO MY-BUFFER-POINTER", where MY-BUFFER is a character variable declared in the LINKAGE section.
Do not blame me if I made a typo, COBOL is some years behind, but believe me this worked perfectly and avoids having huge modules when not necessary.
Nicolas
_________________
Nicolas Maréchal
Senior Architect - Partner
NIMCONSULT Software Architecture Services (Belgium)
http://www.nimconsult.be |
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