I think it was a pie in the sky suggestion. = =
> Date: Thu, 23 May 2013 20:07:25 +0000 > From: [email protected] > Subject: Re: B37 för FTINCL in ISPF for userid.ISPnnnnn.SPFTEMPn.WORK datasets > To: [email protected] > > >That way if you specified SPACE=(CYL,(10,+5)) and got the primary and 10 > >extents, the file size would be 285 cylinders and a primary with 15 extents > >would be 610 cylinders as opposed to 60 and 75 cylinders respectively. > > I don't remember that in any JCL doc I've ever seen. > Where is this documented? > Or, am I misreading this post and it only applies to DB2's allocations? > - > Ted MacNEIL > [email protected] > Twitter: @TedMacNEIL > > -----Original Message----- > From: "Blaicher, Christopher Y." <[email protected]> > Sender: IBM Mainframe Discussion List <[email protected]> > Date: Thu, 23 May 2013 12:21:07 > To: <[email protected]> > Reply-To: IBM Mainframe Discussion List <[email protected]> > Subject: Re: B37 för FTINCL in ISPF for userid.ISPnnnnn.SPFTEMPn.WORK datasets > > That is a concept that DB2 uses. It can start at 1 cylinder and increase the > secondary by 1 on each extend. > > If you changed the SPACE parameter to accept: > > SPACE=(unit,(n,+m,... > Where unit = TRK/CYL/etc and n=Primary allocation and +m is the initial > secondary amount and increment > > That way if you specified SPACE=(CYL,(10,+5)) and got the primary and 10 > extents, the file size would be 285 cylinders and a primary with 15 extents > would be 610 cylinders as opposed to 60 and 75 cylinders respectively. > > Amount per allocation - 10 5 10 15 20 25 30 35 40 45 50 55 60 65 > 70 75 > Total allocation 10 15 25 40 60 85 115 150 190 235 285 340 400 465 > 535 610 > > This might be attractive for an EA enabled data set where even a > SPACE=(CYL,(10,+10)) gets you to about 75,030 cylinders in 123 extents. > > Chris Blaicher > Principal Software Engineer, Software Development > Syncsort Incorporated > 50 Tice Boulevard, Woodcliff Lake, NJ 07677 > P: 201-930-8260 | M: 512-627-3803 > E: [email protected] > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Tom Marchant > Sent: Thursday, May 23, 2013 10:33 AM > To: [email protected] > Subject: Re: B37 för FTINCL in ISPF for userid.ISPnnnnn.SPFTEMPn.WORK datasets > > On Thu, 23 May 2013 16:44:55 +0200, Thomas Berg wrote: > > >The system should allocate/reallocate according to what is needed in > >the actual/immediate need for the dataset without dumping the problem > >to the user! (Of course limited by appropriate resource constraints.)" > > For situations like that, I like to use an allocation like CYL,(1,100). > Allocate a small primary and a much larger secondary. Maybe also allowing > multiple volumes. > > Perhaps another useful construct would be an allocation where each secondary > extent was bigger than the previous. > SMS would have a hard time with such a data set though. > > -- > Tom Marchant > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send email to > [email protected] with the message: INFO IBM-MAIN > > > > ATTENTION: ----- > > The information contained in this message (including any files transmitted > with this message) may contain proprietary, trade secret or other > confidential and/or legally privileged information. Any pricing information > contained in this message or in any files transmitted with this message is > always confidential and cannot be shared with any third parties without prior > written approval from Syncsort. This message is intended to be read only by > the individual or entity to whom it is addressed or by their designee. If the > reader of this message is not the intended recipient, you are on notice that > any use, disclosure, copying or distribution of this message, in any form, is > strictly prohibited. If you have received this message in error, please > immediately notify the sender and/or Syncsort and destroy all copies of this > message in your possession, custody or control. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
