JCL - Can we concatenate two Datasets having different LRECL? If yes, then how?

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Can we concatenate two Datasets having different LRECL? If yes, then how?

Total Answers and Comments: 4

Last Update: April 15, 2009 Asked by: Abhishek

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Submitted by: mainframeguru11

THE RULE FOR CONCATANATION IS

1. LRECL and RECORD FORMAT SHOULD BE SAME
2. IF THE BLOCK SIZE IS DIFFERENT THEN LARGEST BLOCK SIZE DATASET SHOULD BE IN THE FIRST DSN NAME
3. DATASET MAY RESIDE IN DIFFERENT DEVICE AND VOLUMES.

Above answer was rated as good by the following members:
serken

December 14, 2007 10:51:00

The Master

Member Since: December 2007 Contribution: 1

RE: Can we concatenate two Datasets having different LRECL? If yes, then how?

Yes as long as the dataset with largest block size appears first.

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April 18, 2008 04:57:05

Mazhar9

Member Since: December 2007 Contribution: 7

RE: Can we concatenate two Datasets having different LRECL? If yes, then how?

Abhishek

Let us say one file is having LRECL 20 and other one is having 80.. then Change the lowest LRECL 20 file format to 80 using 3.3 copy option then merge two files using sort.

ThnQ
Mazhar

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June 10, 2008 11:28:47

mainframeguru11

Member Since: June 2008 Contribution: 1

RE: Can we concatenate two Datasets having different LRECL? If yes, then how?

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April 15, 2009 18:47:33

dhs01

Member Since: April 2009 Contribution: 24

RE: Can we concatenate two Datasets having different LRECL? If yes, then how?

The largest first rule is one that has not been applicable for awhile. At one time this was necessary because of buffer allocations. This is no longer required.

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