I have still been unable to test this. In my current
environment I'm unable to create non-cataloged
datasets. It's probably an SMS thing.
The only thing I would have done differently to your
test, Mark, would have been to remove the ddname
(@NOTCAT) from the first ALLOC command. I'm
wondering if the use of a specific ddname makes it
unavailable to satisfy the second ALLOC request.
Speaking of SMS, I also wonder if the "several criteria"
that determine the eligibility of an existing allocation
to satisfy a subsequent request have changed as a
result of SMS.
Or, maybe I imagined tho whole thing?
> Date: Thu, 28 Feb 2008 09:34:49 -0600
> From: [EMAIL PROTECTED]
> Subject: Re: TSO ALLOC concat using VOLSER?
> To: [email protected]
>
> On Wed, 27 Feb 2008 20:14:24 -0500, J R <[EMAIL PROTECTED]> wrote:
>
> >From the description of the ALLOCATE command
> >operands in TSO/E Command Reference, SA22-7782:
> >
> >"When you invoke ALLOCATE to perform dsname
> >dynamic allocation, an "allocation environment"
> >already exists for your request. It consists of the
> >allocation requests, made via your JCL or internal
> >dynamic allocation, that have not yet been
> >deallocated. These resources are considered to be
> >existing allocations, and are considered first in the
> >attempt to fill your ALLOCATE requests. If possible,
> >ALLOCATE will use an existing allocation to satisfy
> >your dsname allocation request. Although some
> >parameters can be changed if necessary, the
> >request and the existing allocation must match
> >according to several criteria before the allocation
> >can be selected to satisfy your request."
> >
> >This was my recollection from the early '70s,
> >although it's more generalized than I wrote in my
> >earlier post. However, I'm sure I remember it
> >working in the case of non-cataloged datasets.
> >
> >I haven't had a chance to try it yet but, until I do,
> >I'll take Mark's word for it that it doesn't work
> >like I thought it did.
> >
>
> It's even worse... try this, where TGTRES is a maintenance
> sysres:
>
> PROC 0
> CONTROL MSG LIST CONLIST
> ALLOC FI(@NOTCAT) DA('SYS1.SAMPLIB') +
> SHR UNIT(SYSALLDA) VOL(TGTRES) SHR REUSE
> ALLOC FI(@MYDD) DA('SYS1.SAMPLIB' +
> 'SYS1.MACLIB') SHR REUSE
>
>
> It works, but if you look at what gets allocated to @MYDD, it is
> the cataloged version of SYS1.SAMPLIB, not the uncataloged
> version.
>
> Using the same sample with a data set that is not cataloged at all
> in place of SYS1.SAMPLIB, the second ALLOCATE fails:
>
> IKJ56228I DATA SET blah.blah NOT IN CATALOG OR CATALOG CAN NOT BE ACCESSED
> IKJ56109I DATA SETS NOT CONCATENATED+
>
> IKJ56109I FAILURE TO ALLOCATE DATA SET blah.blah
>
>
> --
> Mark Zelden
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