z/OS MVS JCL Reference
Previous topic | Next topic | Contents | Contact z/OS | Library | PDF

Disposition of QSAM data sets

z/OS MVS JCL Reference

Do not code DISP=MOD if the data control block (DCB) specifies RECFM=FBS and the data set is processed by QSAM. If you do and a block is shorter than the specified block size, QSAM assumes that the short block is the last block and starts end-of-file processing. By this action, QSAM can embed short blocks in your data set and so affect the number of records per track.

Go to the previous page Go to the next page

Copyright IBM Corporation 1990, 2014