[email protected] (Sam Siegel) writes: > Please consider the RAS on the US domestic phone switching network. > It is a distributed system that (to my knowledge) does not use z/OS or > zSeries hardware. You also have service providers like Google, the > global DNS servers, etc. The list can be easily extended to > demonstrate extremely good RAS overall on a distributed system where > high RAS is deemed important.
long ago & far away ... 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 ... which except for IMS hot-standby, saw very little update until sysplex & parallel sysplex. She didn't remain very long ... in part because of the slow uptake ... but also the periodic battles with the communication group trying to force her into using SNA for loosely-coupled operation. misc. past posts mentioning peer-coupled shared data architecture http://www.garlic.com/~lynn/submain.html#shareddata when we were doing HA/CMP product for the company ... I had coined the terms "disaster survivability" and "geographic survivability" (to differentiate from disaster/recovery). I had also been asked to write a section for the corporate continuous availability strategy document ... but it got pulled when both Rochester (as/400) and POK (mainframe) complained (that they couldn't meet the requirements). We also did some work with the 1-800 service (database service that maps 1-800 numbers to "real" exchange number ... required five-nines availability). misc. past posts mentioning ha/cmp http://www.garlic.com/~lynn/subtopic.html#hacmp later we had some dealings with one of the large financial transaction infrastructures ... and they attributed thier multiple year, 100% availability to * geographically separated, replicated IMS hot-standby operation * automated operator i.e. as hardware has became much more reliable ... unscheduled outages came to be dominated by environmental issues/outages and human mistakes -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
