John, You. Hit the nail on the head.... Sent from my iPad Scott Ford Senior Systems Engineer www.identityforge.com
On Feb 19, 2012, at 8:35 PM, Fred Hoffman <[email protected]> wrote: > Amen John!! > > ________________________________ > > From: IBM Mainframe Discussion List on behalf of John Gilmore > Sent: Fri 2/17/2012 6:21 PM > To: [email protected] > Subject: Re: Archaic allocation in JCL (Was: Physical record size query) > > > > Frank Swabrick wrote: > > <begin snippet> > | No, I'm not expecting a real answer to that question. > | Just trying to point out why it's hard, to say the least, > | to know how to size files of this type. > </end snippet> > > The question itself has not been very well formulated. > > No one, I hope and suppose, sizes files directly in cylinders, tracks > or megabytes. These are derived quantities. One begins with record > types, their individual sizes, and their expected volumes/counts. > > Initially one has only estimates, often poor ones, of > transaction/processing volumes, but these estimates can be improved > incrementally by collecting statistics of the volumes actually > experienced during processing and then analyzing these data.. > > That this is not much done does not been that it cannot or should not > be done. > > Adequate capacity planning and even many design decisions are > impossible without the systematic collection and analysis of such > information. > > John Gilmore, Ashland, MA 01721 - USA > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
