My understanding is that it makes no difference. PDSE is basically a stream. It fills 4K blocks and writes them. When you read it back, you can change the BLKSIZE. I.e. write as 80/800 and read it back as 80/3280.
Chris Blaicher Phone: 512-340-6154 Mobile: 512-627-3803 -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Eric Bielefeld Sent: Thursday, February 11, 2010 11:21 AM To: IBM-MAIN@bama.ua.edu Subject: Re: PDS vs. PDSE I was just thinking - I wonder if the blocksize I used is bad for PDS/E, givin the 4096 page six. Will it write blocks at 7520, or just write 4K blocks? Should I make the blocksize something with a closer multiple of 4096? Eric -- Eric Bielefeld Systems Programmer IBM MVS Technical Services Dubuque, Iowa 563-845-4363 ---- Wayne Driscoll <wdri...@us.ibm.com> wrote: > Eric, > This is probably due to the fact that PDS/E's require a minimum of 1 page > per member (Point 14 in Radalsow's summary). Since these are JCL members, > I would imagine that a fair number of them are 15-20 line members, with > the 4K minimum member size,for an FB-80 dataset that works out to just > over 51 records, so any JCL that is under 51 lines will still take up 4K > each, while in a PDS an 80 byte member takes 80 bytes in the PDS itself > (after the directory of course). > > =============================================== > Wayne Driscoll > OMEGAMON DB2 L3 Support/Development > wdrisco(AT)us.ibm.com > =============================================== ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
