Frank, Your point is well taken. Often no one has the responsibility.
Still, while the system cannot analyze itself, it can include data-collection machinery that greatly facilitates such analyses; and this machinery is/should be the responsibility of those who design and maintain a system --jg On 2/17/12, Frank Swarbrick <frank.swarbr...@yahoo.com> wrote: > But who has the responsibility? This seems something that a system > programmer, with some good analysis tools, should do. Or the system itself > should be such that it can do it's own analysis. After all, is that not > what computers are for? > > Frank > > > > >>________________________________ >> From: John Gilmore <johnwgilmore0...@gmail.com> >>To: IBM-MAIN@bama.ua.edu >>Sent: Friday, February 17, 2012 5:21 PM >>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 lists...@bama.ua.edu with the message: INFO IBM-MAIN >> >> >> > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN > -- John Gilmore, Ashland, MA 01721 - USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
