Robert,
The problem I think is with SAS (design issue?) . I believe that with
any other application when you get to the the end of input you would
reasonably close the data set. But I am guessing that SAS does not
close the input until it has completed processing .
I am not familiar with MICS but perhaps it would be faster to strip
out the SMF records its needs (Type xx etc). This can be done with
IFSADMP or any other utility (perhaps SORT or ICETOOL with IF control
cards which certainly be a lot faster).
If MICS needs ALL SMF records then I would guess you are stuck.
Ed
On Nov 30, 2006, at 8:24 AM, Robert Bardos wrote:
Am I correct in assuming that does not mean what it
says; that what it
should say is something like "Coding FREE=CLOSE has no
effect except when
it
is coded in the last jobstep that refers to the dataset"?
No. It means what it says. The ENQ is not released,
but the data set is
freed. This is useful in the case of SYSOUT, allowing
JESx to print it
immediately. I'm not sure, but I think it will cause
the tape drive to be
unloaded also.
May I add to this with a real life example? We are running MICS
jobs reading some 20 to 30 tapes sequentially from DDname
INPUTSMF. The input process itself is taking about two hours. In
the very same step the data are being processed further, this
"processing further" taking another three to six hours. Since
there are other jobs/applications that want to input the same
data, I thought (erroneously as I learned from the discussion)
that by adding FREE=CLOSE to the DD statement the dataset(s) would
be available to those other jobs as soon as DDname INPUTSMF is
closed. Would this be my own design, I'd consider splitting up the
step in two pieces but it's MICS and I'm still in the learning
phase (wonder whether that will change anytime soon ...) so this
idea is not applicable. What options do I have?
(environment is JES3 with z/OS 1.7)
TIA
Robert Bardos
Ansys AG, Zürich, Switzerland
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