The analyst has to have the numbers for it is he(she) that is
designing the system.
He is supposed to be the giver of the grail.
The real issue is which analyst. There are several different types
business, system and a few others.
The delineation is supposed to be the job description.
The real problem is who's pervue does it come under if it is no one.
Ed
On Feb 17, 2012, at 7:03 PM, Frank Swarbrick 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 <[email protected]>
To: [email protected]
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
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