Untrue cases a rare, should be getting more rare, and should be fixed! Some utilities (Syncsort) allow you to specify where to copy blksize from input or use SDB
Dave Gibney Information Technology Services Washington State University > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Dave Kopischke > Sent: Friday, March 27, 2009 12:03 PM > To: [email protected] > Subject: Re: Optimal Tape Blocksize > > On Fri, 27 Mar 2009 02:54:10 -0700, Walter Marguccio wrote: > > > > >I agree 100%. I told our programmers long ago to stick to > >BLKSIZE=0 *and* DSORG=PS for datasets on DASD. This always work > >(BLKSIZE close to half track). > > This is not always true.... > > > > >I can't understand why such poor BLKSIZE are chosen. I would really > appreciate > >if anyone could shed some light on this. > > > > When we switched, we found some programs specify block sizes and > blocking > factors. If this happens, SDB doesn't get invoked. In this case, you > HAVE to > specify a reasonable blocksize in your JCL. > > I haven't seen this happen with any utilities, but I do see utilities > propogating > a bad blocksize from the input. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
