IBM Mainframe Forum

Hello,

I need some help. If you using option 3.13 to compare a dataset that you can get the Hashsum of a member of a PDS. Please help if I do not want to get it from the superc compare what are the method that I can get the hashsum for a member. The purpose is try to improve the performance.

I need to fine tune a REXX program from 10 hours to 2 hours. I wonder if you use an external subroutine will improve the efficiency or slow down the efficient. Is it a good idea to pass to external subroutine with a big array. Any tools can help with this process except using sysvar(syscpu). Will strobe be helpful?

using GL for a subroutine what can be gain from that will it run faster or less resource?

Hello,

What is GL?

What is the interest in a hashsum?

What does the 10-hour rexx program accomplish?

If you explain what is needed (rather than work on how to improve the existing process), someone may have a suggestion on ow to meet your requirement.

The hashsum serves a purpose like a checkdigit. It will be good to know what is used in the supercCE compare.

Hello,

Yes, most people will know that a hashsum can be used as a "check digit".

Suggest you now answer the questions asked previously. . .

Firstly If I know where is the utiltiy or routine that I can use to calculate the checksum then I can only do the one that is necessary hence it will improve the process

Secondly the process is to create a dictionary and it takes a long time so run I am trying to find the way to improve the performance.