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yadav2005 · Intermediate Joined: 10 Jan 2005 Posts: 348 Topics: 144

I have a compressed VSAM file which I am not able to map to a copybook, is there anyway I can convert compress to get the uncompressed file and then map it to copybook
and make changes to the uncompressed file and then compress it back to the original way.And one more condition is before i do this task I want to try out in test as I do not want to
try with the original file.Please help me in this regard.

Bill Dennis · Posted: Tue Apr 21, 2009 10:40 am Post subject:

How did the file get compressed? By software? Hardware?
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Bill Dennis

Disclaimer: My comments on this foorum are my own and do not represent the opinions or suggestions of any other person or business entity.

yadav2005 · Intermediate Joined: 10 Jan 2005 Posts: 348 Topics: 144

Bill,

Must be by some utility , I am not aware of compressing and uncompressing techniques also as I am quite new.I really do not understand why we should be compressing and uncompressing and I am quite new to
this task.

Bill Dennis · Posted: Tue Apr 21, 2009 3:47 pm Post subject:

Without knowing how the file was compressed you will not get much help.

Usually compression is done to reduce space used. System software (DFSMS) can compress files when stored but the data uncompresses when read. It is transparent to you.
_________________
Regards,
Bill Dennis

Disclaimer: My comments on this foorum are my own and do not represent the opinions or suggestions of any other person or business entity.

expat · Posted: Wed Apr 22, 2009 12:54 am Post subject:

As Bill has said, when read the data should be decompressed by the software that had originally compressed it.

Try using REPRO to a flat file and take a look at the output.
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