At 19:13 -0500 on 07/08/2008, Paul Gilmartin wrote about Re: want to
read a dataset in use:
But beware, if in a subsequent step your JCL references that
data set, even with DISP=SHR, the job's inial TIOT will have an
entry for it, and creating the data set dynamically will upgrade
the ENQ to EXC, and the data set will remain inaccessible
outside that job until that later step finishes.
(Or so I've been told.)
-- gil
Thinking outside the box, what happens if I define an ALIAS for the
top level index (INDEX2 as an alias of INDEX1) or the full dataset
name (INDEX.FILE2 as an alias of INDEX.FILE1) and try to access via
the alias'ed name. Will it spot the duplicate usage or do the ENQ on
the Alias'ed name and thus allow me o get away with it? Also, if I am
APF authorized, I can allocate the dataset bypassing the ENQ and thus
open it to use to write a duplicate/cloned copy which can then be
scanned in lieu of the original.
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