How to use VSAM files in assmbler



High Level Assembler(HLASM) for MVS & VM & VSE

How to use VSAM files in assmbler

Postby vikram G » Tue Feb 22, 2011 4:43 pm

Hi All,

Can anyone please give me a idea about how to use VSAM files in assmbler? I have some aidea how to use flat files?
Its urgent?
vikram G
 
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Re: How to use VSAM files in assmbler

 

Re: vsam files.

Postby enrico-sorichetti » Tue Feb 22, 2011 4:48 pm

we do not do urgent,
and accessing vsam thru assembler is not for the faint of hart or inexperienced people and itself cannot be done urgently!
z/OS V1R10.0 DFSMS Macro Instructions for Data Sets
at http://publibz.boulder.ibm.com/cgi-bin/ ... 0122165044
will tell all You might want to know,
cheers
enrico
When I tell somebody to RTFM or STFW I usually have the page open in another tab/window of my browser,
so that I am sure that the information requested can be reached with a very small effort
enrico-sorichetti
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Re: vsam files.

Postby vikram G » Tue Feb 22, 2011 4:57 pm

Thanks for your reply. I think I may get all info in that link. Thanks for your timely help. Sorry to make you urgent. :)
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Re: How to use VSAM files in assmbler

Postby BillW » Fri Nov 11, 2011 1:08 am

You use the ACB to generate access control block. Then you use RPL to generate specific requests. I have done this in VM a long time ago(92). Not really all that hard. Like anything else, it helps to have the manuals. My objective was to speed up the load of a KSDS file containing 40 million records. I chained a bunsh of RPLs and sent it off all at once. It did speed up the process and cut the cpu times.
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