Groups > alt.folklore.computers > #218548

Re: the wonders of SABRE, was Magnetic Drum reservations 1952

From	Anne & Lynn Wheeler <lynn@garlic.com>
Newsgroups	alt.folklore.computers
Subject	Re: the wonders of SABRE, was Magnetic Drum reservations 1952
Date	2021-07-27 18:49 -1000
Organization	Wheeler&Wheeler
Message-ID	<87sfzzniuh.fsf@localhost> (permalink)
References	<92412095-9c81-46cc-87cb-f5d9c00e2581n@googlegroups.com> <sd7u91$1p0u$1@gal.iecc.com> <933c7f28-a120-4f18-ba8c-79f301438224n@googlegroups.com> <87wnpbnkj8.fsf@localhost>

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other ACP/TPF trivia ... while ACP/TPF didn't have (tightly-coupled)
multiprocessor support ... it had done a lot of work for loosely-coupled
multiprocessor (shared dasd, cluster). Standard OS/360 mechanism was
reserve/release whole device ... ACP/TPF improved on that by putting a
logical "symbolic" lock manager in the 3830 disk controller (for 3330
disks) ... which supported four channel interface connecting to four
different systems.

old email from jim gray looking for ACP/TPF locking experience ... for
input to (original sql/relational) system/r
http://www.garlic.com/~lynn/2008i.html#email800325

past posts
http://www.garlic.com/~lynn/2018e.html#94 It's 1983: What computer would you buy?
http://www.garlic.com/~lynn/2017d.html#42 What are mainframes
http://www.garlic.com/~lynn/2016c.html#9 You count as an old-timer if (was Re: Origin of the phrase "XYZZY")
http://www.garlic.com/~lynn/2011p.html#76 Has anyone successfully migrated off mainframes?
http://www.garlic.com/~lynn/2011l.html#33 Selectric Typewriter--50th Anniversary
http://www.garlic.com/~lynn/2011j.html#0 program coding pads
http://www.garlic.com/~lynn/2011i.html#77 program coding pads
http://www.garlic.com/~lynn/2008i.html#39 Amercian Airlines
http://www.garlic.com/~lynn/2001.html#26 Disk caching and file systems. Disk history...people forget

disk division later tried to have them move away ... since the strategic
direction was string switch ... allowing two 3830 controllers for string
of 3330 disks ... each with four system connect for total eight systems
total ... the problem was that controller based logical lock manager
didn't work across multiple (3830) controllers.

loosely-coupled/cluster HONE trivia: One of my hobbies after joining IBM
was enhanced production operating systems for internal datacenters
... and HONE was long-time customer ... online world-wide
sales&marketing support system. In the mid-70s, the US HONE datacenters
were consildated in Palo Alto (later when FACEBOOK 1st moves into
silicon valley, it is into a new bldg built next door to the former HONE
datacenter) ... and system enhanced for 8-way loosely-coupled operation
(eight indendent systems sharing same disk farm with load-balancing and
fall-over).

since it was 8-way ... needing two controllers ... so couldn't use
the ACP/TPF controllere logical locking ... put it needed something
significantly better than the standard (os/360) device reserve/release.
The implmentation used was a channel-program sequence that did search
data equal ... and if matched ... would do update ... basically
simulating the (SMP) 370 "compare&swap" instruction (charlie had
invented compare&swap when he was doing fine-grain CP67 multiprocessor
kernel locking at the science center, CAS originally chosen because
they are charlie's initials, which got added to 370).

In the morph of CP67->VM370 product, they simplified and/or dropped a
lot of stuff (including a bunch of my stuff as well as the CP67
tightly-coupled multiprocessor support). HONE applications were heavily
APL-based and even with eight 168-3s for US HONE, it was still CPU
limited. I had gotten around to significantly enhanced VM370
... including a lot of stuff from CP67. I then got around to putting in
the CP67 (tightly coupled) multiprocessor support ... so HONE could add
a 2nd CPU to each system for 16 processors

HONE (&/or APL) posts
http://www.garlic.com/~lynn/subtopic.html#hone
SMP, tightly-coupled, and/or compare&swap posts
http://www.garlic.com/~lynn/subtopic.html#smp
cambridge science center (4th flr, 545tech sq) posts
http://www.garlic.com/~lynn/subtopic.html#545tech
system/r posts
http://www.garlic.com/~lynn/submain.html#systemr

--
virtualization experience starting Jan1968, online at home since Mar1970

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Magnetic Drum reservations 1952 undefined Hancock-4 <hancock4@bbs.cpcn.com> - 2021-07-20 12:14 -0700
  Re: the wonders of SABRE, was Magnetic Drum reservations 1952 John Levine <johnl@taugh.com> - 2021-07-21 01:46 +0000
    Re: the wonders of SABRE, was Magnetic Drum reservations 1952 David Lesher <wb8foz@panix.com> - 2021-07-22 14:46 +0000
      Re: the wonders of SABRE, was Magnetic Drum reservations 1952 chris <chris-nospam@tridac.net> - 2021-07-22 17:37 +0100
        Re: the wonders of SABRE, was Magnetic Drum reservations 1952 scott@slp53.sl.home (Scott Lurndal) - 2021-07-22 16:47 +0000
          Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Andy Burns <usenet@andyburns.uk> - 2021-07-22 17:51 +0100
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 John Levine <johnl@taugh.com> - 2021-07-22 17:25 +0000
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Ahem A Rivet's Shot <steveo@eircom.net> - 2021-07-22 18:10 +0100
              Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-07-23 00:13 +0000
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 TrailingEdgeTechnologies <bbreynolds@aol.com> - 2021-07-22 19:32 -0700
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 TrailingEdgeTechnologies <bbreynolds@aol.com> - 2021-07-22 19:44 -0700
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Dan Espen <dan1espen@gmail.com> - 2021-07-22 15:14 -0400
              Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Ahem A Rivet's Shot <steveo@eircom.net> - 2021-07-22 20:52 +0100
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Dan Espen <dan1espen@gmail.com> - 2021-07-22 17:05 -0400
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Quadibloc <jsavard@ecn.ab.ca> - 2021-07-23 09:13 -0700
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 undefined Hancock-4 <hancock4@bbs.cpcn.com> - 2021-07-23 11:48 -0700
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Robin Vowels <robin.vowels@gmail.com> - 2021-07-23 20:13 -0700
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-07-24 21:35 +0000
              Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Andy Burns <usenet@andyburns.uk> - 2021-07-22 21:10 +0100
              Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Grant Taylor <gtaylor@tnetconsulting.net> - 2021-07-22 14:16 -0600
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Dan Espen <dan1espen@gmail.com> - 2021-07-22 17:08 -0400
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 TrailingEdgeTechnologies <bbreynolds@aol.com> - 2021-07-22 20:08 -0700
              Re: the wonders of SABRE, was Magnetic Drum reservations 1952 scott@slp53.sl.home (Scott Lurndal) - 2021-07-23 16:18 +0000
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Louis Krupp <lkrupp@invalid.pssw.com.invalid> - 2021-07-24 11:54 -0600
          Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Vir Campestris <vir.campestris@invalid.invalid> - 2021-07-25 21:51 +0100
            Re: sixbit, the wonders of SABRE, was Magnetic Drum reservations 1952 John Levine <johnl@taugh.com> - 2021-07-25 21:12 +0000
              Re: sixbit, the wonders of SABRE, was Magnetic Drum reservations 1952 Thomas Koenig <tkoenig@netcologne.de> - 2021-07-26 05:32 +0000
                Re: sixbit, the wonders of SABRE, was Magnetic Drum reservations 1952 Bob Eager <news0009@eager.cx> - 2021-07-26 08:39 +0000
                Re: sixbit, the wonders of SABRE, was Magnetic Drum reservations 1952 gareth evans <headstone255@yahoo.com> - 2021-07-26 12:21 +0100
                Re: sixbit, the wonders of SABRE, was Magnetic Drum reservations 1952 Rich Alderson <news@alderson.users.panix.com> - 2021-07-26 18:45 -0400
                Re: sixbit, the wonders of SABRE, was Magnetic Drum reservations 1952 gareth evans <headstone255@yahoo.com> - 2021-07-27 11:29 +0100
        Re: the wonders of SABRE, was Magnetic Drum reservations 1952 TrailingEdgeTechnologies <bbreynolds@aol.com> - 2021-07-22 19:43 -0700
          Re: the wonders of SABRE, was Magnetic Drum reservations 1952 undefined Hancock-4 <hancock4@bbs.cpcn.com> - 2021-07-23 11:46 -0700
    Re: the wonders of SABRE, was Magnetic Drum reservations 1952 undefined Hancock-4 <hancock4@bbs.cpcn.com> - 2021-07-23 11:56 -0700
      Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Peter Flass <peter_flass@yahoo.com> - 2021-07-23 16:27 -0700
        Re: the wonders of SABRE, was Magnetic Drum reservations 1952 undefined Hancock-4 <hancock4@bbs.cpcn.com> - 2021-08-07 12:38 -0700
          Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Thomas Koenig <tkoenig@netcologne.de> - 2021-08-07 20:04 +0000
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-08-07 22:24 +0100
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-08-07 22:27 +0100
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 undefined Hancock-4 <hancock4@bbs.cpcn.com> - 2021-08-10 11:49 -0700
              Re: the wonders of SABRE, was Magnetic Drum reservations 1952 J. Clarke <jclarke.873638@gmail.com> - 2021-08-10 15:34 -0400
          Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Robin Vowels <robin.vowels@gmail.com> - 2021-08-07 18:13 -0700
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 undefined Hancock-4 <hancock4@bbs.cpcn.com> - 2021-08-10 11:45 -0700
              Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Robin Vowels <robin.vowels@gmail.com> - 2021-08-11 06:36 -0700
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Peter Flass <peter_flass@yahoo.com> - 2021-08-11 08:00 -0700
          Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Peter Flass <peter_flass@yahoo.com> - 2021-08-10 10:57 -0700
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-08-10 18:29 +0000
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 undefined Hancock-4 <hancock4@bbs.cpcn.com> - 2021-08-10 11:54 -0700
            Re: the wonders of SABRE, was Magnetic Drum reservations 1952 scott@slp53.sl.home (Scott Lurndal) - 2021-08-10 19:44 +0000
              Re: the wonders of SABRE, was Magnetic Drum reservations 1952 undefined Hancock-4 <hancock4@bbs.cpcn.com> - 2021-08-13 12:26 -0700
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Anne & Lynn Wheeler <lynn@garlic.com> - 2021-08-13 09:49 -1000
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 undefined Hancock-4 <hancock4@bbs.cpcn.com> - 2021-08-16 12:52 -0700
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 scott@slp53.sl.home (Scott Lurndal) - 2021-08-16 20:06 +0000
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-08-16 23:31 +0000
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 scott@slp53.sl.home (Scott Lurndal) - 2021-08-17 15:41 +0000
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 scott@slp53.sl.home (Scott Lurndal) - 2021-08-18 16:38 +0000
                Re: the wonders of SABRE, was Magnetic Drum reservations 1952 "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-08-18 18:29 +0100
      Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Anne & Lynn Wheeler <lynn@garlic.com> - 2021-07-27 18:12 -1000
        Re: the wonders of SABRE, was Magnetic Drum reservations 1952 Anne & Lynn Wheeler <lynn@garlic.com> - 2021-07-27 18:49 -1000

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