Hi Scott, "An alternative may be to create/maintain an SMS-managed, short-lived (consider zEDC for efficiency) WEEKLY GDG (sorted or at least consider DD GDGORDER=FIFO parameter)."
The weekly GDGs I have are already sorted in order, so was wondering if IFASMFDP efficiently cuts off processing the weekly GDG after it has collected all data points from the supplied DATE parameter. – Vignesh Mainframe Infrastructure -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Scott Barry Sent: 04 December 2018 17:13 To: IBM-MAIN@LISTSERV.UA.EDU Subject: [EXTERNAL] Re: IFASMFDP On Tue, 4 Dec 2018 16:45:26 +0000, Sankaranarayanan, Vignesh <vignesh.v.sankaranaraya...@marks-and-spencer.com> wrote: >Hello! > >Say there's a file called SMF.WEEKLY and it is a huge, multi-volume file, and >is an aggregate of all SMF.DAILY files (data is sequential). >If I want to pick out data from just the first day of the week from >SMF.WEEKLY, using IFASMFDP, apart from specifying DATE(yyddd,yyddd), is there >a more efficient way? > >That is, knowing that the data I need ends within the first few vols of the >multi-vol SMF.WEEKLY, is there a way to avoid the cost of going through the >whole SMF.WEEKLY file? > >As always, thanks for your inputs. > >- Vignesh >Mainframe Infrastructure > > >MARKSANDSPENCER.COM >________________________________ >Unless otherwise stated above: >Marks and Spencer plc >Registered Office: >Waterside House >35 North Wharf Road >London >W2 1NW > >Registered No. 214436 in England and Wales. > >Telephone (020) 7935 4422 >Facsimile (020) 7487 2670 > >www.marksandspencer.com > To your question/point with "..within the first few vols..." -- not likely if you want high accuracy and completeness with the extracted data-subset -- would need to know VOLSERs and select/choose somewhat arbitrarily. As for IFASMFDP date-selection parameter generation, review the DFSORT programmer guide documentation for "relative date" function / generation. An alternative may be to create/maintain an SMS-managed, short-lived (consider zEDC for efficiency) WEEKLY GDG (sorted or at least consider DD GDGORDER=FIFO parameter). Scott Barry SBBWorks, Inc. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
