This is clou (the point). Many users, a lot o JCL jobs, people are
unaware of the JCL, they can only change volser...
Excuse me, but it looks like kindergarten with no teachers on board. For
45 years.
It is not technical issue, this is strong organizational problem. And
this should be fixed. Yes, people could be unhappy.
BTW: even in this kindergarten it is feasible to identify all the job
libraries and change JCL code.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 23.09.2020 o 10:42, Brian Westerman pisze:
Unfortunately, after about 45 years of doing it "this way", the users have a
lot of their own JCL, it would not be economical or feasible to train or expect thousands
of them to change or even know how to change their JCL. Many of them (most) don't even
know what they are editing, they just replace a VOLSER with the one from the listing they
have and submit the job. In a nice little environment where you can control these
things, you are probably correct, but that is not the case in this instance.
Brian
On Tue, 22 Sep 2020 12:55:05 +0200, R.S. <r.skoru...@snip-it.com.pl> wrote:
My €0.02:
This is typical problem when the goal is NOT defined.
Existing approach seems ridiculous, but it exists. It works.
So, since it works, why to change it? What is the reason? What goal is
to achieve?
More ridiculous are the terms. JCL cannot be changed. WHY???
However JES2 exit6 which changes JCL "in the flight" is allowed. Why???
Datasets are important, but the chances it will be ever read are small.
Uncataloged datasets are a problem, however there is no big problem with
duplicate names and volser which is known after the dataset is created.
My opinion:
First, recognize the situation and define the problem, then define the goal.
Never use tapes, especially for small datasets. Including virtual tapes.
Small datasets can be written to DASD, zEDC can be used to compress it.
And DFSMS MC can be used to migrate it to tape. Yes, tapes are still
good for backup and ML2.
Large number of datasets is not a problem, that's what are user catalogs
for.
Good naming convention will help with ACS routines and ICF aliases.
It can be GDG or just HLQ.YEAR.SOME.NAME.Ddate, or so. I would not go to
PDSE members. Member are good candidate for really big number of really
small files. Note, the smallest chunk of DASD is one track. The smallest
chunk of PDSE is 4kB, and for PDS is just the size of file, it can be
one byte. However migrated dataset occupies zero tracks.
All the revolution require ...just simple changes in JCL and few changes
in DFSMS realm. I can do that for peanuts ;-)
--
Radoslaw Skorupka
Lodz, Poland
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