Bill, Think EAV volume...
I just had a lot of fun with this very scenario building DEFRAG experiments. 20000x1 track dataset, and then delete every second dataset across 256 volumes. Who would have thought that the UCAT size would be my biggest problem (5 million datasets). Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] > On Behalf Of DASDBILL2 > Sent: Thursday, February 06, 2014 1:27 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: [IBM-MAIN] Implicit VVDS creation > > The theoretical worst case for a TSO pack is that every track on the volume > could be a single-track data set, except for the following: volume label > track, > VTOC, VTOC index, and VVDS. And each such single-track data set would > need at least one DSCB (Format 1) record in the VTOC, and you can only get > about 50 of them on each VTOC track. > > Bill Fairchild > > ----- Original Message ----- > > From: "Ed Gould" <edgould1...@comcast.net> > To: IBM-MAIN@LISTSERV.UA.EDU > Sent: Thursday, February 6, 2014 1:44:08 PM > Subject: Re: Implicit VVDS creation > > Doug: > > Any TSO pack is a mandatory larger VTOC and a larger VVDS. > > A *LONG* time ago I had a TSO pack that needed a 5 cylinder vtoc. I don't > expect that has changed and if SMS managed a larger than typical VVDS as > well. > > Ed > > On Feb 6, 2014, at 1:31 PM, Doug Fuerst wrote: > > > It's true, but I get alot of datasets in a small VTOC too. I can't > > actually recall ever having to allocate a VVDS except for a very > > special situation. > > > > Doug > > > > Doug Fuerst > > BK Associates > > 718.921.2620 > > 917.572.7364 > > d...@bkassociates.net > > > > > > > > ------ Original Message ------ > > From: "Ed Gould" <edgould1...@comcast.net> > > To: IBM-MAIN@listserv.ua.edu > > Sent: 2/6/2014 1:47:17 PM > > Subject: Re: Implicit VVDS creation > > > >> Doug: > >> > >> Somewhere along the line I though SMS datasets requires an entry for > >> each one. > >> > >> Ed > >> On Feb 6, 2014, at 12:25 PM, Doug Fuerst wrote: > >> > >>> You have that many VSAM datsets on a volume? > >>> 10 tracks holds a fair amount of data for a VVDS. > >>> > >>> Doug > >>> > >>> Doug Fuerst > >>> BK Associates > >>> 718.921.2620 > >>> 917.572.7364 > >>> d...@bkassociates.net > >>> > >>> > >>> > >>> ------ Original Message ------ > >>> From: "David G. Schlecht" <dschle...@admin.nv.gov> > >>> To: IBM-MAIN@listserv.ua.edu > >>> Sent: 2/6/2014 12:55:12 PM > >>> Subject: Re: Implicit VVDS creation > >>> > >>>> Hold the presses! The documents for v1r13 say the VVDSSIZE > >>>> defaults to TRKS(10 10). Holy cow, that's a whole lot less than > >>>> 10 cylinders. > >>>> > >>>> One would think that at 10 tracks, the VVDS would run out of > >>>> space (and extents) quite frequently but I don't see this being > >>>> a frequent topic on IBM-MAIN. > >>>> > >>>> > >>>> snip>>> > >>> > >>> -------------------------------------------------------------------- > >>> -- > >>> 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 > >> > >> > > > > ---------------------------------------------------------------------- > > 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 > > > ---------------------------------------------------------------------- > 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
