You are likely correct. I set this up many years ago now. All our application data is SMS. I probably do cover rlse with the most commonly used, default MGMTCLAS
> -----Original Message----- > From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On > Behalf Of Vernooij, Kees (ITOP NM) - KLM > Sent: Tuesday, March 05, 2019 11:22 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: Disk space allocation question [EXTERNAL] > > RLSE in the Dataclas? This is a Mgmtclas option. > > Kees. > > > > -----Original Message----- > > From: IBM Mainframe Discussion List [mailto:IBM- > m...@listserv.ua.edu] > > On Behalf Of Gibney, Dave > > Sent: 05 March, 2019 23:19 > > To: IBM-MAIN@LISTSERV.UA.EDU > > Subject: Re: Disk space allocation question [EXTERNAL] > > > > My DEFAULT DATACLAS specifies a SPACE allocation, fairly large with > > RLSE. This, plus space constraint relief, and also EXT as the DEFAULT > > has eliminated almost all x37 abends here. > > I also still run FDR COMPAK, fairly aggressive DFHSM migration to ML2 > > VTL, and a good sized overflow pool. > > > > > -----Original Message----- > > > From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> > On > > > Behalf Of Sean Gleann > > > Sent: Tuesday, March 05, 2019 3:37 AM > > > To: IBM-MAIN@LISTSERV.UA.EDU > > > Subject: Re: Disk space allocation question [EXTERNAL] > > > > > > *sigh* I sometime wonder why I spend so much time making sure that > > text > > > positioning, justification, etc is 'just right', only to see all > > > that > > work thrown > > > away. > > > I hope those that read my previous response can make sense of it... > > > > > > Sean > > > > > > On Tue, 5 Mar 2019 at 11:32, Sean Gleann <sean.gle...@gmail.com> > > wrote: > > > > > > > Thanks to all who have responded on this. I've been having 'fun' > > > > experimenting with allocating files of various sizes on a badly > > > > fragmented disk volume and at least I now understand why an 'I' > > > > command against a file shown in an ISPF 3.4 list occasionally > > > > shows > > such > > > surprising values. > > > > > > > > I don't appear to be able to make ALLOCxx settings (such as > > > > PRIM_ORG or > > > > RLSE) affect matters at all. I played around with various > > > > settings, but all to no avail, but then I spotted Paul's response > > > > where he > > says > > > > "...ALLOC should not step in if you have SPACE coded in your > > JCL...". > > > > So I removed the SPACE clause in my DD statement... and the job > > failed > > > > with a JCL error and messages: > > > > IEF344I jobname REQ911 REQ911 - ALLOCATION FAILED DUE TO DATA > > > FACILITY > > > > SYSTEM ERROR IGD17045I SPACE NOT SPECIFIED FOR ALLOCATION OF > > > DATA SET > > > > The IGD... message means that "...No space was specified on the > > > > JCL > > or > > > > in the data class for the allocation of the data set..." which is > > > > precisely the situation. My JCL did not feature a SPACE clause, > > > > and > > my > > > > SMS dataclass rule for the file in question has 'override space' > > > > set to 'N', and no 'Space' values defined. I had expected ALLOC > > > > values > > to > > > > be used, but that did not happen. > > > > > > > > I'm not sure where to go from here. I cannot claim to be > > > > proficient with SMS at all, so I don't really want to risk > > > > upsetting a system > > to > > > > works (most of the time!) > > > > > > > > Regards > > > > Sean > > > > > > > > > > > > On Mon, 4 Mar 2019 at 15:50, Vernooij, Kees (ITOP NM) - KLM < > > > > kees.verno...@klm.com> wrote: > > > > > > > >> 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. 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