Ron, I'm not sure I understand your advice. Could you explain the
difference between specifying BLKSIZE=0 and coding BLKSIZE=0?
TIA,
Greg Shirey
Ben E. Keith Company
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED]
Behalf Of Ron and Jenny Hawkins
Sent: Wednesday, February 15, 2006 9:26 AM
<snip>
One of my soap boxes - best practice for SDB is not to specify BLKSIZE=0, it
is to specify the DCB and omit the BLKSIZE, or specify the DCB and code
BLKSIZE=0.
I don't quite understand Ron either.
In JCL, coding/specifying BLKSIZE=0 and omitting BLKSIZE altogether are
equivalent (unless a blocksize comes from a data class, in which case
BLKSIZE=0 will over ride it). If you also specify the RECFM, LRECL, and
DSORG=PS or PO in JCL or in the data class, then SDB will be invoked to
calculate a blocksize.
If and only if SDB was invoked at allocation time, if you OPEN with a
DCB specifying a different LRECL and RECFM and don't specify BLKSIZE (or
specify it as zero) in your program, SDB will recalculate the blocksize
at OPEN time.
--
Bruce A. Black
Senior Software Developer for FDR
Innovation Data Processing 973-890-7300
personal: [EMAIL PROTECTED]
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web: www.innovationdp.fdr.com
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