Article View: alt.folklore.computers
Article #620178Re: Important US technology companies sold to foreigners
From: Anne Lynn Wheeler
Date: Tue, 06 Feb 2018 04:13
Date: Tue, 06 Feb 2018 04:13
15 lines
2786 bytes
2786 bytes
Dan Espen <dan1...@gmail.com> writes: > Hence things like CKD disk, APPC, 3270, VSAM. Originally, CKD disk could trade off excess channel & I/O capacity in the mid-60s (with sequential search operations) against scarce real memory. A decade later, the trade-off had inverted ... disk, control unit and channel capacity was becoming the scarce resources (bottleneck) with real storage becoming increasingly abundant. Real storage was then being used for file caching and index ... trying to alleviate the disk i/o bottleneck ... but CKD searches were so ingrained in OS/360 that they continued to be part of the design. Even tho no real CKD have been built for decades ... OS/360 descendants still require CKD simulation (on industry standard fixed block disks). past posts mentioning CKD, multi-track searches, FBA, etc http://www.garlic.com/~lynn/submain.html#dasd
Technical Details
Message-ID:
<87607a92my.fsf@garlic.com>Path:
mbox-mo1.pugleaf.net!n14ni30250wmi.0!nntp.google.com!goblin2!goblin1!goblin.stu.neva.ru!eternal-september.org!feeder.eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mailReferences:
<2c5ea5c8-9317-4a35-8775-d736ebbb6327@googlegroups.com> <87607fce56.fsf@usenet.ankman.de> <kq7a7d1sjsqnltmkm789ql5r38s36ecnc9@4ax.com> <p54ndg$g3s$1@pechter.eternal-september.org> <8qtb7d5n9t5h883cclkl1csd1f103snnkb@4ax.com> <p54vka$b5v$1@dont-email.me> <9d71bdb2-2096-4bf3-996c-7108b3675c61@googlegroups.com> <266155326.539397906.147073.peter_flass-yahoo.com@news.eternal-september.org> <87zi4po4qf.fsf@garlic.com> <f3d6b55b-414c-456f-acaa-2966dd999a74@googlegroups.com> <1851958163.539573802.765720.peter_flass-yahoo.com@news.eternal-september.org> <p5b4qt$3r0$1@dont-email.me>Show Full Headers
Complete Article Headers
X-Received: by 10.28.48.88 with SMTP id w85mr91147wmw.30.1517890407243; Mon, 05 Feb 2018 20:13:27 -0800 (PST) X-BeenThere: alt.folklore.computers@googlegroups.com Received: by 10.223.187.9 with SMTP id r9ls989902wrg.4.gmail; Mon, 05 Feb 2018 20:13:26 -0800 (PST) X-Received: by 10.223.166.209 with SMTP id t75mr93280wrc.19.1517890406595; Mon, 05 Feb 2018 20:13:26 -0800 (PST) Path: mbox-mo1.pugleaf.net!n14ni30250wmi.0!nntp.google.com!goblin2!goblin1!goblin.stu.neva.ru!eternal-september.org!feeder.eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail From: Anne & Lynn Wheeler <ly...@garlic.com> Newsgroups: alt.folklore.computers Subject: Re: Important US technology companies sold to foreigners Date: Mon, 05 Feb 2018 18:13:25 -1000 Organization: Wheeler&Wheeler Lines: 15 Message-ID: <87607a92my.fsf@garlic.com> References: <2c5ea5c8-9317-4a35-8775-d736ebbb6327@googlegroups.com> <87607fce56.fsf@usenet.ankman.de> <kq7a7d1sjsqnltmkm789ql5r38s36ecnc9@4ax.com> <p54ndg$g3s$1@pechter.eternal-september.org> <8qtb7d5n9t5h883cclkl1csd1f103snnkb@4ax.com> <p54vka$b5v$1@dont-email.me> <9d71bdb2-2096-4bf3-996c-7108b3675c61@googlegroups.com> <266155326.539397906.147073.peter_flass-yahoo.com@news.eternal-september.org> <87zi4po4qf.fsf@garlic.com> <f3d6b55b-414c-456f-acaa-2966dd999a74@googlegroups.com> <1851958163.539573802.765720.peter_flass-yahoo.com@news.eternal-september.org> <p5b4qt$3r0$1@dont-email.me> Mime-Version: 1.0 Injection-Info: reader02.eternal-september.org; posting-host="30c44156e4970a0e3998b4e8e6e79f9f"; logging-data="26752"; mail-complaints-to="ab...@eternal-september.org"; posting-account="U2FsdGVkX19GX5a2XMXQxl4tjBywpgz2MSRpTX11riA=" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) Cancel-Lock: sha1:q1NRZgm32skFOTSXRq75WrK5nyU= sha1:6AXS2MGigFHBOaDja9QaNRxfSNE= Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit