IBM Mainframe Forum

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?

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,

Thanks for your reply. I think I may get all info in that link. Thanks for your timely help. Sorry to make you urgent.

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.