On Mon, 7 Sep 2015 11:15:01 +0200, Peter Hunkeler wrote: >It seems I'm having a senior moment. > > >For years, I used to allocate data sets in ISPF 3.2, leaving the block size >field empty. The system then calculated the block size based on RECFM anf >LRECL. The result was half track blocking. > > >At my new employer, I get the block size set to maximum (for RECFM & LRECL), >so FB-80 leads to 32720. This is z/OS V2.1. This is only via ISPF 3.2; in >batch, I still get half track blocking. > > >What am I missing? >
What type of dataset? PS, PO, PDSE, ...? The optimal block size for PDSE (FB-80, DSNTYPE=LIBRARY) is 32720. Norbert Friemel ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
