[email protected] (Mark Regan) writes: > https://it.toolbox.com/blogs/trevoreddolls/happy-50th-birthday-cics-070719
As an undergraduate, within a year after taking 2hr intro to computing/fortran (they had 709 tape->tape with 1401 unit record front-end ... manually moving tapes between 709 drives and 1401 drives), I was hired fulltime to be responsible for academic and administration mainframe systems (they had 360/67 replacing 709/1401 supposedly for tss/360 which never quite came to production fruition, and so ran as 360/65 with os/360). I got to redo a lot of os/360, including sysgen. Student fortran jobs ran less than second on 709, but initially move to os/360 ran over minute (about 100 times slower). Adding HASP, cut it about in half (over 30 seconds). I then redid sysgen to carefully place datasets and members in PDS for optimal arm seek and PDS directory multi-track search ... which improved another factor of three. Last week in January 1968, three people from the science center came out to install CP67 ... which I would get to play with on weekends ... along with OS/360 work (univ. shutdown datacenter from 8am sat until 8am monday ... and I would have the place to myself, although it made any Monday morning class a little hard having gone 48hrs w/o sleep). Part of old SHARE presentation fall 1968 ... mostly CP/67 pathlength rewrites to improve OS/360 running in virtual machine (put also some amount of carefully reordered os/360 stage2 sysgen to optimize dataset arm seek and PDS directory multi-track search) http://www.garlic.com/~lynn/94.html#18 University library gets ONR grant to do online library catalog and part of the money goes for 2321 datacell. 1969 was also selected as one of the original CICS product betatest sites ... and supporting/debugging CICS was added to responsibility. One of the "bugs" was original CICS had some undocumented hard coded BDAM file options and university was using a different set of options. W/o source, it took some time to diagnose CICS startup was failing with BDAM file open (and why). lots of CICS history, gone 404 but lives on at wayback machine http://web.archive.org/web/20050409124902/http://www.yelavich.com/cicshist.htm and http://web.archive.org/web/20071124013919/http://www.yelavich.com/history/toc.htm -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
