Another poster (sorry I deleted the post so can't credit him) already stated that the addressable range depends on the method you use to access the data set. Yes relative track addressing is 2 bytes and limited to 64K tracks. But relative block addressing is 3 bytes and so limited to 16M blocks. So depending on your block size you can address more than the physical limit of the data set. However, as Curtis has just pointed out, Adabas itself doesn't use BDAM, it uses EXCP/EXCPVR. And yes Curtis you are correct - most of our Adabas data sets are DSORG=DA but some of them are indeed DSORG=PS. Because I inherited these systems I'm not quite sure why. Must be something to do with the way they were first allocated and formatted (maybe different releases of Adabas), but it doesn't make a difference, they both work fine. Cheers, Mick.
On Fri, 2 Nov 2018 at 12:30, Giliad Wilf < 000000d50942efa9-dmarc-requ...@listserv.ua.edu> wrote: > Interesting. > I recall two statements, probably from two different sources: > > One states that BDAM does not support large format datasets. > > The other states that DA datasets accessed by relative track address are > limited to 65536 tracks. > > ...so, I must assume ADABAS has a way for accessing records of a dataset > that large... > > On Fri, 2 Nov 2018 11:32:23 +0000, Mick Graley <mick.gra...@gmail.com> > wrote: > > >Hi All, > > > >I can confirm that there is no 64K tracks limit on DSORG=DA data sets. > >I inherited a number of Adabas databases and they use DSORG=DA. > >One of my larger databases has a data storage component that is 240,525 > >tracks (16,035 cylinders) in 9 extents across 8 volumes. > > > >Organization . . . : DA > >Record format . . . : F > >Record length . . . : 5064 > >Block size . . . . : 5064 > >1st extent cylinders: 363 > >Secondary cylinders : 1668 > >Allocated cylinders : 16,035 > >Allocated extents . : 9 > > > >The rules are documented here: > > > https://www.ibm.com/support/knowledgecenter/SSLTBW_2.3.0/com.ibm.zos.v2r3.idad400/mdss.htm > > > >Cheers, > > > >Mick. > > > > > >On Sat, 27 Oct 2018 at 01:10, Steve Smith <sasd...@gmail.com> wrote: > > > >> BDAM implies DSORG DA, but can use any RECFM. However, DSORG DA files > are > >> usually physically equivalent to DSORG PS, and often are so designated. > >> However, most DA files I've seen are indeed RECFM=F. > >> > >> sas > >> > >> On Fri, Oct 26, 2018 at 11:40 AM Tom Sims <trs...@att.net> wrote: > >> > >> > Datacom may use some method of "direct access," but the datasets > >> > themselves are RECFM=F. > >> > >> ---------------------------------------------------------------------- > >> 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
