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amitjain231
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Joined: 04 Mar 2005
Posts: 8
Location: asd
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Can u help me when we specify BLKSIZE = 0 in JCL.
Any Significance?
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priya
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Joined: 24 Jul 2003
Posts: 568
Location: Bangalore
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superk
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Joined: 26 Apr 2004
Posts: 4652
Location: Raleigh, NC, USA
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See this page from the "z/OS v1R6.0 DFSMS: Using Data Sets" manual:
publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DGT2D430/3.2.3.1.2?DT=20040624112123#HDRSYS
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DASD Data Sets: When you create (allocate space for) a new DASD data set, the system derives the optimum block size and saves it in the data set label if all of the following are true:
- Block size is not available or specified from any source. BLKSIZE=0 can be specified.
- You specify LRECL or it is in the data class. The data set does not have to be SMS managed.
- You specify RECFM or it is in the data class. It must be fixed or variable.
- You specify DSORG as PS or PO or you omit DSORG and it is PS or PO in the data class.
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