There are ACS options: ACS routines can assign a Dataclass with Space Atributes plus the option that it will override space in JCL, even for non-SMS managed datasets. For SMS managed datasets, the DataClass' Space Constraint Relief options can adjust space allocations.
Kees > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On > Behalf Of Feller, Paul > Sent: 04 March, 2019 16:40 > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: Disk space allocation question [EXTERNAL] > > It is my understanding that the ALLOC should not step if you have SPACE > coded in your JCL. By default you should get your space request, though > it might be in more than one extent (up to 5). Now if you have some 3rd > party software installed it might be stepping in to prevent the initial > X37 abend on allocation. I don't recall if you could code something in > the ACS routines to step in to adjust the primary allocation. > > Thanks.. > > Paul Feller > AGT Mainframe Technical Support > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On > Behalf Of Elardus Engelbrecht > Sent: Monday, March 04, 2019 6:33 AM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: Disk space allocation question [EXTERNAL] > > Sean Gleann wrote: > > >Does z/OS / SMS have a set of default space allocation sizes and if so, > where are they held and can I alter or control them? > > Look in ALLOCxx as kindly suggested by Roger Lowe. > > If you know what SMS routines were used, look at their definitions. > > > >I have a situation where insufficient contiguous disk space results in > the SPACE request parameters supplied for a DISP=(NEW...) file with > values that are too low to fulfil the final requirements. > >Example: I request SPACE=(TRK,(9000,1000)… and what I get is > ...TRK,(7200,500), which eventually leads to a B37 abend. > > Please post that full B37 abend message. There may be another reason why > you are not getting what you want. > > What about trying to use more than one volser for your allocation > attempts? > > > >It's that 'eventually' bit that is most disheartening. I would far > rather have the space request completely refused along with a job abend > rather than have the system 'try to help' me. > > Buy more disks... ;-) > > Pre-allocations may help before you actually use it, but of course, how > do you know what size is 'correct'? > > Groete / Greetings > Elardus Engelbrecht > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > Please note: This message originated outside your organization. Please > use caution when opening links or attachments. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ******************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ******************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
