Joined: 26 Nov 2002 Posts: 12354 Topics: 75 Location: San Jose
Posted: Fri Apr 30, 2021 11:05 am Post subject:
I don't have an answer for your question, however I was wondering about the actual requirement. Looking at the structure you may have about 90-500 bytes of internal table and looking at the field names it seems that you can have variable length data.
Now assuming that there is a service to compress the data, how do you plan to decompress the data when you want to read it back? Doesn't the compress and decompress chew up an additional CPU ? Does this outweigh the storage allocation? _________________ Kolusu - DFSORT Development Team (IBM)
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Joined: 10 Oct 2003 Posts: 314 Topics: 48 Location: germany
Posted: Fri Apr 30, 2021 11:48 am Post subject:
thank you for your reply.
Yes the sample for the requirement looks strange. The requirement is a little bit more complex, here reduced.
The question is more general according any available compression function in zOS / PL/1 as callable service or some thing other like that.
After reading the PL/1 manual, google search, search here in the forum, before posting the question, only third party products seems to be available for compression tasks in zOS in combination with PL/1.
So please no more efforts, we will try to find some other solution.
Joined: 14 Nov 2003 Posts: 66 Topics: 0 Location: St Cloud, Minnesota USA
Posted: Thu May 06, 2021 10:58 pm Post subject:
Bauer, are you attempting to reduce the size of the data in memory OR are you attempting to reduce the size of the data when stored on DASD.
If you are attempting to reduce the size on DASD, then refer to the sms acs routines. SMS compression can either be done by software or if a zEDC chip is installed, then it can be done with hardware compression off of the main CP's. _________________ Chuck Haatvedt
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