Path: csiph.com!news.mixmin.net!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail From: Anne & Lynn Wheeler Newsgroups: alt.folklore.computers,comp.os.linux.misc Subject: Re: COBOL and tricks Date: Tue, 19 Jul 2022 14:26:31 -1000 Organization: Wheeler&Wheeler Lines: 51 Message-ID: <87k0887hoo.fsf@localhost> References: <871quvs7m8.fsf@usenet.ankman.de> <87sfn8pr5t.fsf@usenet.ankman.de> <87zghai2dh.fsf@usenet.ankman.de> <16ydncnktcv0sE__nZ2dnUU7-Q3NnZ2d@earthlink.com> <1034215367.679945065.348792.peter_flass-yahoo.com@news.eternal-september.org> <2074045549.679949818.212355.peter_flass-yahoo.com@news.eternal-september.org> MIME-Version: 1.0 Content-Type: text/plain Injection-Info: reader01.eternal-september.org; posting-host="07ed0feb730e1a3bcd927cb960894596"; logging-data="1304892"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18Q4U34Qj8Vr9mVgYY5znOArzyoyPFbP9I=" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) Cancel-Lock: sha1:Ss5xoTQwK/4XDPbeHrKixpy7OKc= sha1:+inVANaYeI5eMdBoZTnHgJYCxLk= Xref: csiph.com alt.folklore.computers:221147 comp.os.linux.misc:35102 Lew Pitcher writes: > A long time ago, I worked on many COBOL applications, including a > client (PC) / server (MVS) communications application. I've seen > things that I cannot unsee, coded things that I cannot uncode. around turn of the century was brought into look at performance of 450K Cobol statement application that ran on 40+ max configured IBM mainframes (@$30M, >$1B, number needed to finish batch settlement in overnight window). They had large group responsible for the performance care & feeding, but got somewhat myopically focused. I used some other analysis tools from the IBM science center in the early 70s and found 14% improvement. There was another performance consultant that was brought in and found a different 7% improvement. In the early 70s, there was a CMS\APL-based analytical system model done at the science center ... which was made available on the world-wide, branch office, sales & marketing support online HONE systems as the "Performance Predictor"; branch people could enter customer's configuration and workload profiles and ask "what-if" questions about changes in configuration and/or workload. During the IBM troubles in the early 90s and lots of stuff was being unloaded, the consultant managed to obtain the rights to a descendant of the "Performance Predictor", ran it through an APL->C language converter and was using in for performance consulting business (not just large IBM mainframes, but other vendors also). a few past archived a.f.c. posts mentioning the 450k cobol statement app http://www.garlic.com/~lynn/2006u.html#50 Where can you get a Minor in Mainframe? http://www.garlic.com/~lynn/2007u.html#21 Distributed Computing http://www.garlic.com/~lynn/2008c.html#24 Job ad for z/OS systems programmer trainee http://www.garlic.com/~lynn/2008d.html#73 Price of CPU seconds http://www.garlic.com/~lynn/2008l.html#81 Intel: an expensive many-core future is ahead of us http://www.garlic.com/~lynn/2009d.html#5 Why do IBMers think disks are 'Direct Access'? http://www.garlic.com/~lynn/2009e.html#76 Architectural Diversity http://www.garlic.com/~lynn/2009f.html#55 Cobol hits 50 and keeps counting http://www.garlic.com/~lynn/2017k.html#57 When did the home computer die? http://www.garlic.com/~lynn/2018d.html#2 Has Microsoft commuted suicide http://www.garlic.com/~lynn/2018f.html#13 IBM today http://www.garlic.com/~lynn/2019e.html#155 Book on monopoly (IBM) reference to IBM having one of the largest corporate losses in US history and was being reorganized into 13 "baby blues" in preparation to breaking up the company gone behind paywall, but mostly lives free at wayback machine. http://web.archive.org/web/20101120231857/http://www.time.com/time/magazine/article/0,9171,977353,00.html may also work http://content.time.com/time/subscriber/article/0,33009,977353-1,00.html -- virtualization experience starting Jan1968, online at home since Mar1970