maryanne4...@gmail.com (Mary Anne Matyaz) writes: > Customer designs a new datacenter, moves in, has an issue where a guy > in a backhoe clips the incoming power source. Customer is patting > themselves on the back for the wisdom of having two separate power > lines, one on each side of the building.
early days of internet ... connectivity out of the boston area was set up with nine(?) different 56kbit links with diverse routing (telco provisioning) ... physically separate lines & exchanges over the years, telco company eventually consolidated all nine links until they were being carried on a common fiber-optic trunk ... one day, someplace in Connecticut, a backhoe clips the fiber-optic trunk ... and boston was partitioned from the rest of the internet. ... one customer we were marketing ha/cmp to ... had major datacenter in large metropolitan area ... carefully chosen to be in building that was fed by multiple water mains down different sides of the building, four different power feeds from different physical power substations and four different telephone trunks to different physical central exchanges (all different sides) one day transformer in the basement blew ... contaminating the bldg. with PCB ... everything was off and bldg. had to be evacuated. ha/cmp had started work on supporting physical separate and I coin the marketing terms "disaster survivable" and "geographic survivable" (to differentiate from disaster/recovery). I get asked to write section in corporate continuous available strategy document ... but the section gets pulled when both Rochester and POK complain (that they couldn't meet the requirements, at least at that time). misc. past posts mentioning ha/cmp http://www.garlic.com/~lynn/subtopic.html#hacmp -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
