That means you are taking defaults. So the Init and Tuning Reference will
provide more info
ALLOCxx (allocation system defaults)
Use the ALLOCxx member of SYS1.PARMLIB to define installation defaults for:
Unit names (dynamic allocation, unit-affinity-ignored, and redirection from
TAPE)
Space attributes
TIOT size
Handling allocation requests
Catalog error policies.
These installation defaults for handling allocation requests can be overridden
by installation exit routines specified in the EXITxx parmlib member. For
information about the allocation exit routines, see z/OS MVS Installation
Exits. After IPL, use the SETALLOC command to change any of the defaults
(except for 2DGT_EXPDT).
Lizette
> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]] On
> Behalf Of Styles, Andy (SD EP zPlatform)
> Sent: Tuesday, July 19, 2016 8:07 AM
> To: [email protected]
> Subject: Re: Default space allocation
>
> I have, and it wasn't apparent in there that it would have the effect we've
> seen.
>
>
> Andy Styles
> z/Series Systems Programmer
>
>
>
>
> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]] On
> Behalf Of Lizette Koehler
> Sent: 19 July 2016 15:49
> To: [email protected]
> Subject: Re: Default space allocation
>
> -- This email has reached the Bank via an external source --
>
>
> Have you checked out the ALLOCxx member of SYS1.PARMLIB (Or your version)?
>
> Lizette
>
> > -----Original Message-----
> > From: IBM Mainframe Discussion List [mailto:[email protected]]
> > On Behalf Of Styles, Andy (SD EP zPlatform)
> > Sent: Tuesday, July 19, 2016 7:34 AM
> > To: [email protected]
> > Subject: Default space allocation
> >
> > Hi All,
> >
> > We've had a minor issue a few times over the past year or so. On our
> > GDPS control systems, we have a null SMS configuration - all datasets
> > are allocated with UNIT=SYSALLDA (I think I'm explaining this right),
> > otherwise you get SPECIFY DEVICE OR CANCEL.
> >
> > The issue we seem to have hit is that people using XMIT/RECEIVE seem
> > to allocate enormous datasets - one yesterday was 45K tracks, 1% used,
> > which used up nearly all the free space on the volume, and caused
> > another job to fail as it was unable to get the space it needed.
> >
> > I vaguely remember reading somewhere about default space allocation
> > being something along the lines of "whatever space remains on the volume".
> >
> > Does this ring any bells with anyone, or am I just dreaming it? Can
> > these parameters be changed, and if so, where? I've been hunting but
> > can't track it down.
> >
> > Many thanks,
> >
> > --
> > Andy Styles
> > z/Series Systems Programmer
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