[EMAIL PROTECTED] wrote:
UNIX was officially named in 1970. MVS was released in 1974. However
MVS was preceded by MVT which was released in 1964.
os/360 ... pcp. i don't remember that you could "sysgen" mvt until
release 12.
boeing huntsville had custom modified mvt version 13 with virtual memory
support running on two processor 360/67. the system didn't support
paging ... but workload was a lot of long running 2250 (graphics)
"jobs". mvt had a tendency to fragment storage ... and mvt applications
tended to require contiguous storage allocation. use of virtual memory
hardware allowed emulation of contiguous storage (even when real storage
was severely fragmented).
at the univ. we didn't "sysgen" mvt until release 15/16 (i.e. there had
been problems with release 15 which delayed ship ... and they eventually
shipped it as combined with release 16).
some historical references:
http://www.os390-mvs.freesurf.fr/mvshist1.htm
http://mcraeclan.com/Links/Computers/IBMMainframeHistory/mvshist1.htm
the above references "sysgen" process which was typically done using the
"starter" system.
at the univ, starting with release 11, I had done a lot of work for
doing "sysgens" in production job stream. apart of this was that as an
undergraduate, I would get the datacenter to myself on the weekends (8am
sat. until 8am monday). however, related to release 9.5 sysgen, a couple
of univ. employees and local ibm SEs would take a couple weekend shifts
to boot starter system and do release 9.5 sysgen. i got curious and
duplicated their stage1 sysgen deck ... and then started looking at what
was involved in the process. basically would assemble stage1 sysgen deck
... which would "punch" a bunch about a box of cards ... that
represented the "stage2" sysgen ... that actually built the new system
(50-80 job steps, lots of iebcopy and iehmove steps, along with
smattering of other stuff).
part of the activity was to redo sysgen so i could run it in production
job stream. the other was so that i could carefully control the
placement of datasets and pds members for optimal disk arm movement (in
the resulting generated system).
later boeing was putting together bcs (boeing computer services) and
they hired me for summer job to help set things up. i was given an
management badge (that allowed me to park in "management" parking lot at
boeing hdqtrs bldg at boeing field). they had installed a new 360/67
uniprocessor for running cp67 and were in the process of acquiring the
360/67s that were at boeing huntsville.
misc. past posts mentioning modifying stage1/stage2 sysgen to run in
production job stream ... note previous mention about presentation made
at fall68 share meeting in boston regarding running os/360 in cp67
virtual machine ... also mentions getting around 300percent increase in
thrput for some typical univ. workload with the careful disk arm motion
optimization.
http://www.garlic.com/~lynn/94.html#18 CP/67 & OS MFT14
http://www.garlic.com/~lynn/97.html#22 Pre S/360 IBM Operating Systems?
http://www.garlic.com/~lynn/97.html#28 IA64 Self Virtualizable?
http://www.garlic.com/~lynn/98.html#21 Reviving the OS/360 thread
(Questions about OS/360)
http://www.garlic.com/~lynn/2000d.html#50 Navy orders supercomputer
http://www.garlic.com/~lynn/2001i.html#30 IBM OS Timeline?
http://www.garlic.com/~lynn/2001k.html#37 Is anybody out there still
writting BAL 370.
http://www.garlic.com/~lynn/2002m.html#3 The problem with installable
operating systems
http://www.garlic.com/~lynn/2003c.html#51 HASP assembly: What the heck
is an MVT ABEND 422?
http://www.garlic.com/~lynn/2004c.html#59 real multi-tasking,
multi-programming
http://www.garlic.com/~lynn/2004k.html#41 Vintage computers are better
than modern crap !
http://www.garlic.com/~lynn/2004l.html#29 FW: Looking for Disk Calc
program/Exec
http://www.garlic.com/~lynn/2005b.html#41 [Lit.] Buffer overruns
http://www.garlic.com/~lynn/2005h.html#6 Software for IBM 360/30 (was
Re: DOS/360: Forty years)
http://www.garlic.com/~lynn/2005n.html#40 You might be a mainframer
if... :-) V3.8
http://www.garlic.com/~lynn/2005o.html#12 30 Years and still counting
http://www.garlic.com/~lynn/2005s.html#50 Various kinds of System reloads
http://www.garlic.com/~lynn/2005t.html#18 Various kinds of System reloads
http://www.garlic.com/~lynn/2006e.html#45 using 3390 mod-9s
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