Good morning all,
It's a slow day and I have a question on how ADRDSSU behaves during a
logical backup. This may be a silly question, but I am curious.
We had a short running batch job fail last night with a JCL error,
while another long batch job was running doing a logical backup that
included the needed proclib dataset referenced by the short running
batch job.
Environment is z/OS 1.4.
This one long running ADRDSSU - logical batch job, (runs one hour most
times), had to be backing up the library that the short running batch
job needed. Timing issue I realize. The short batch job had a proclib
statement and an include statement. The short running batch job had a
JCL error and here is the messages from that job and JCL:
>From the short batch job JCL:
PROCLIB JCLLIB ORDER=xxx.xxxx.xxxx.xxxx.PROCLIB
INCLUDE MEMBER=xxxxx
Output from short batch job:
IEFC003I ALLOCATION ERROR IN PROCESSING A JCLLIB STATEMENT
IKJ56225I DATA SET xxx.xxxx.xxxxx.xxxx.PROCLIB ALREADY IN USE, TRY
LATER+
IKJ56225I DATA SET IS ALLOCATED TO ANOTHER JOB OR USER
IEFC017I INCLUDE xxxxx WAS NOT FOUND
I looked up the IEFC003I message and it is somewhat clear.
I know that we can re-run the short batch job and it finishes okay now,
but, my question is: What kind of an enqueue does ADRDSSU put on the
datasets during a logical backup. It seems like it must be a DISP=OLD,
but can I code anything different to help the short running batch job in
the future, since all it does is READ the proclib include member? The
schedule is kinda tight during nightly batch processing and since the
short batch job kicks off based on a predessor job, which is at
different times during the nightly batch cycle.
I haven't found anything from an ADRDSSU perspective. We dump with
TOL(ENQF), but that is for ADRDSSU.
Just curious what ADRDSSU does during a logical and can we sneak past
this scenario in the future somehow?
Thanks all,
Claude
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