"Walter Marguccio" <[email protected]> wrote in message news:<[email protected]>... > >From: "Gibney, Dave" <[email protected]> > > > Still, why worry about details the system will handle for you. > > 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). > > > Behalf Of Ted MacNEIL > > On tape, it's as close to the maximum as possible. > > I thought BLKSIZE=0 would also let the system choose the optimal bloksize > for datasets on tape. I'm starting to review datasets on tape the way Lizette > is doing, and I can see that in some cases the chosen bloksize is really poor. > (i.e. RECFM=FB,LRECL=22,BLKSIZE=0 in jcl, but I see BLKSIZE=4620 under DFSMSrmm) > > In my DEVSUPxx I have only coded COMPACT=YES. > > I can't understand why such poor BLKSIZE are chosen. I would really appreciate > if anyone could shed some light on this. > > TIA > > Walter Marguccio
Beware that BLKSIZE=0 only sets the default. The application might have overriden this to 4620 in this case. Applications sometimes think they 'know' what is best. Kees. ********************************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ********************************************************************** ---------------------------------------------------------------------- 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
