My rule of thumb for SORTWK - space is: You need about 1 1/2 to 2 times the size of SORTIN for your SORTWKs (OK, somebody will probably correct me or point me to where there's documentation about the real values, but that's what I have used in the past). A SORTWK dataset's maximum size is (or used to be when I last messed around with that a few years ago) 64K tracks (4368 CYL). So, going out on my old limb, I guesstimate that for 20,000 CYL of input file you may need between 30,000 and 40,000 CYL of SORTWK space or at least 10 SORTWK DDs. More smaller ones might be better as they allow the disks to be filled more completely. If the disks are SMS managed, an overflow - pool might be a good backstop.
Regards, Ulrich Krueger -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Mark Pace Sent: Friday, April 27, 2012 10:21 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Confused on DFSORT SORTWK I have 8 3390-9 DASD that are strictly for temp space. 99% of the time they are completely empty, as was the case when I was running this as there is no one else on the system right now. I'll try using a bigger number. On Fri, Apr 27, 2012 at 1:17 PM, Ulrich Krueger <u...@pacbell.net> wrote: > Mark, > How much space do you _really_ have available in all your work - disks? How > much junk is cluttering up the space? > Are all volumes enabled and available for allocation? > Try allocating more than 8 SORTWKs (don't go overboard, but (IIRC) you can > allocate as many as 255 SORTWKs if needed) so that SORT can allocate more > but smaller datasets. > > > Regards, > Ulrich Krueger > > > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On > Behalf > Of Mark Pace > Sent: Friday, April 27, 2012 9:52 AM > To: IBM-MAIN@bama.ua.edu > Subject: Re: Confused on DFSORT SORTWK > > I want to switch to dynamic allocation but have no luck making this work. > I used 8 SORTWKxx files to sort this file. So now I want to try it with > dynamic and get the following. > 1 - CONTROL STATEMENTS FOR 5694-A01, Z/OS DFSORT V1R12 - 12:43 ON FRI APR > 27, 2012 - > OPTION > DYNALLOC=(SYSDA,8) > > > RESOURCES WERE UNAVAILABLE FOR DYNAMIC ALLOCATION OF WORK DATA SETS (970C) > FWK=(0,0) SWK=(7,1039528) TWK=(0,0) RWK=(0,0) TOTAL=(7,1039528) BLK=56664 > ATTEMPTED TO ALLOCATE 80250MB OF DISK WORK SPACE ON 8 WORK DATA SETS > SUCCESSFULLY ALLOCATED 56175MB OF DISK WORK SPACE ON 7 WORK DATA SETS > <remainder clipped> > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN > -- The postings on this site are my own and don't necessarily represent Mainline's positions or opinions Mark D Pace Senior Systems Engineer Mainline Information Systems ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
