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HB0 · Beginner Joined: 20 Apr 2005 Posts: 25 Topics: 7

Hello,

As far as I know, the GDG versions can have different LRECLs.
Now, my question is when the GDG base is referred , say we are trying to copy the whole GDG to another GDG, will it throw an error since LRECL's are different or will it truncate the last bytes or the GDG is copied as is.
How is it done internally? When the base is referred, are the versions referred in the order of the generation number ?

Please clarify.

Thanks,
HB0.

kolusu · Posted: Mon May 16, 2005 7:39 am Post subject:

HBO,

If your GDG versions are of FB format then you cannot copy them to a single dataset as you CANNOT concatenate different LRECL datasets.

If your GDG vesions are of VB format then CAN copy them to a single dataset and the output dataset will have the largest LRECL.

When you refer the GDG base alone then the Versions will be referenced as LIFO (last in first out) i.e the latest generation is read first and the oldest generation is read last.

Hope this helps...

Cheers

Kolusu
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vkphani · Intermediate Joined: 05 Sep 2003 Posts: 483 Topics: 48

Hi,

How can I concatenate or merge two sequential files of LRECLs 1156 and 603.
Record Format of both the files is FB.

kolusu · Posted: Mon Aug 01, 2005 7:38 am Post subject:

vkphani,

You cannot concatenate 2 different LRECL FB format datasets. You can only concatenate VB files of different Lrecl's. You need to copy them individually and pad the smallest lrecl dataset with either spaces or low-values.

Hope this helps...

Cheers

Kolusu
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SureshKumar · Intermediate Joined: 23 Jan 2003 Posts: 211 Topics: 21

kolusu,
I had inadvertently put in a wrong answer earlier, however File-Aid seems to handle this requirement efficiently. I had put in a test case and it works fine as long as the receiving file is large enough. Any thoughts/pitfalls ? Thanks

kolusu · Posted: Mon Aug 01, 2005 11:30 am Post subject:

Sureshkumar,

Thanks for your test. I just ran another test and it was successful. File-aid does Not care if the largest LRECL is first in the concatenation list. If smaller LRECL dataset is first in the concatenation it simply truncates the output file and ends with a return code of 4.

Seems like file-aid handles even FB files Similar to VB files.

Kolusu
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