Path: csiph.com!eternal-september.org!feeder.eternal-september.org!nntp.eternal-september.org!.POSTED!not-for-mail From: Lynn Wheeler Newsgroups: comp.os.linux.misc,comp.unix.shell,alt.folklore.computers Subject: Re: NYT and Stratus (Re: [OT] Dead DEC Punch card times) Date: Mon, 09 Nov 2026 07:32:09 -1000 Organization: Wheeler&Wheeler Lines: 35 Message-ID: <87y0b1oqqu.fsf@localhost> References: <18dee4b6cab427fa$865$2574533$802601b3@news.usenetexpress.com> <11cdg33$47sq$1@dont-email.me> <11cdp6v$1qa8$3@gal.iecc.com> <875wy85ba3.fsf@localhost> <11cpv8t$c3gs$1@dont-email.me> <11cqpn5$nfgo$2@dont-email.me> <11cqqh2$ntcu$1@dont-email.me> <11cr1ub$q796$1@dont-email.me> <11creup$trgi$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain Injection-Date: Mon, 09 Nov 2026 17:32:27 +0000 (UTC) Injection-Info: dont-email.me; logging-data="1519194"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19zQZlCkdZlrn0xo2anP5mnLofDp+YUj58="; posting-host="cc0d1c59bf80b5e05b6bd4808524c619" User-Agent: Gnus/5.13 (Gnus v5.13) Cancel-Lock: sha1:u62rHqdH+P6EOSwOi9DZ+/0tLZ8= sha1:kMhElo40R37tIspowuK4Q6t8jMc= sha256:+Zf/sFwQDNW60gElZJYObUIhx8gRiUH/l0Fty8PVU2A= sha1:eDenPoUsM5gyoywHK9u3/QUifI0= sha256:uAbFHKLQA+H4Y7oyFTFQPsR/jPbd2auTQQnoqJw8a2g= Xref: csiph.com comp.os.linux.misc:95387 comp.unix.shell:27357 alt.folklore.computers:236698 c186282 writes: > Noted in this group though - I/O arch diffs between > mainframes and minis. previously posted, 1988, ibm branch office asked me if I could help LLNL with standardization of some serial stuff they had been working with, which quickly becomes fibre-channel standard ("FCS", including some stuff I had done in the 80s, initially 1gbit transfer, full-duplex, aggregate 200mbytes/sec). https://en.wikipedia.org/wiki/Fibre_Channel then IBM releases some serial stuff they had been working with for nearly a decade (when it is already obsolete) as ESCON (initially 10mbytes/sec). Then some IBM engineers get involved with FCS and define a heavy-weight protocol that radically reduced native throughput https://en.wikipedia.org/wiki/FICON Latest public benchmark I've found is 2010 z196 "Peak I/O" getting 2M IOPS using 104 FICON (20K IOPS/FICON). About the same time a native FCS is announced for E5-2600 server blades getting over million IOPS (two such FCS higher throughput than 104 FICON running over FCS). Note IBM docs has SAPs (system assist processors that now do the actual I/O) CPU be kept to 70% ... or 1.5M IOPS ... also no CKD DASD have been made for decades (just simulated with industry standard fixed-block devices). This "Evolution of the System z Channel" (SHARE 2011 presentation at wayback machine) https://web.archive.org/web/20170829213251/https://share.confex.com/share/117/webprogram/Handout/Session9931/9934pdhj%20v0.pdf talks about after 2010 z196 "Peak I/O" benchmark and "zHPF" that increased throughput from 20K IOPS/FICON to 52K IOPS/FICON then to 92K IOPS/FICON (aka from 1/50th to almost 1/10th the native FCS announced in 2010). -- virtualization experience starting Jan1968, online at home since Mar1970