OK ... that is a lot of data. Since an address space provides for just 2GB in the 31 bit range for code, data and system code, you cannot get 3GB in there. You have the following choices: 1) 1 or more data spaces 2) 64bit memory 3) some 31 bit data in current address space; remainder in dataspace(s) and/or 64bit memory.
64 bit memory is the cleanest in terms of using linear addresses. However, if data needs to be referenced by COBOL, you will face problems. You might need to copy back data to 31bit address space or other means. dataspaces cannot be directly accesses by COBOL as you need to be in AR mode and use the proper ALETs. COBOL does not do ALETs. If you go the 64 bit memory route. You can create an API in "c" that will retrieve data on behalf of COBOL and copy it back to 31 bit memory. If you go the dataspace route, you can create an API in asm that will retrieve ALET qualified data on behalf of COBOL and copy it over to non-alet qualified memory. Either way, i think you need an API. On Mon, Mar 9, 2015 at 3:44 PM, Scott Ford <idfzos...@gmail.com> wrote: > Sam, > > 2-3 G ..... > > Regards, > Scott > > On Monday, March 9, 2015, Paul Gilmartin < > 0000000433f07816-dmarc-requ...@listserv.ua.edu> wrote: > > > On Mon, 9 Mar 2015 14:18:15 -0700, Sam Siegel wrote: > > > > >How much data? 10meg? 100meg? 1gig? > > > > > How about 10 gig? None of those numbers would be unreasonable > > if COBOL supported 64-bit addressing. But IBM can't see the use > > for that. > > > > Of course if the data are large enough they go into page data sets > > anyway, but that's utterly transparent to the programmer. > > > > >On Mar 9, 2015 2:06 PM, "Scott Ford" wrote: > > >> > > >> I will have to read and try ..my question is how do i pass a lot of > data > > >> ...a dataspace ? i would like to avoid dasd if I can .. > > > > -- gil > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to lists...@listserv.ua.edu <javascript:;> 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
