marktre...@gmail.com (Mark Regan) writes: > "I recently learned about a bank in Japan that has been using a > mainframe since the 1970's without a single second of downtime. Its > architecture allows for full software and hardware upgrades without an > outage."
i periodically mention that my wife had been con'ed into going to POK to be in charge of loosely-coupled architecture where she did "peer-coupled shared data" architecture. some past posts http://www.garlic.com/~lynn/subnetwork.html#shareddata She didn't say very long, in part because of on-going periodic battles with communication group trying to force her to use sna/vtam for loosely-coupled operation, as well as very little uptake (at the time) ... except for IMS hot-standby. Around the turn of the century, we would periodically drop in on the person that ran large financial transaction operation (33 liberty st, nyc) ... and he credited 100% uptime to 1) automated operator 2) IMS hot-standby ... he had triple replicated IMS hot-standby operation at geographic separated sites. slight topic drift ... when Jim Gray left IBM Research for Tandem, he palmed off bunch off stuff on me ... DBMS consulting with the IMS group, interfacing with BofA, early adopter of original relational/SQL implementation, etc ... http://www.garlic.com/~lynn/submain.html#systemr At tandem he did study of what was causing outages. One of the things he found was that hardware reliability was getting to point where it was responsible for decreasing percentage of outages and other factors were starting to dominate ... software faults, people mistakes, environmental issues like power outages, floods, earthquakes, etc). summary/overview http://www.garlic.com/~lynn/grayft84.pdf later we were doing IBM's (RS/6000) HA/CMP ... some past posts http://www.garlic.com/~lynn/subtopic.html#hacmp and working on both commercial, DBMS ... old reference to Jan1992 meeting in Ellison's conference room http://www.garlic.com/~lynn/95.html#13 as well as technical with gov. agencies and national labs ... some old email http://www.garlic.com/~lynn/lhwemail.html#medusa While out marketing HA/CMP, I coined the terms "geographic survivability" and "disaster survivability" to differentiate from disaster/recovery ... some past posts http://www.garlic.com/~lynn/submain.html#available On the commercial side, the mainframe DB2 group were complaining if I was allowed to continue ... it would be at least five years ahead of them. Shortly later, the cluster scaleup part was transferred and announced as the IBM supercomputer for technical and scientific *ONLY* (and we were told we couldn't work on anything with more than four processors). -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
