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"So you can even install or remove memory or CPUs from them without turning them off." - I did that with IBM pSeries servers decades ago and with commodity Linu
by jjuhl 7y ago
"So you can even install or remove memory or CPUs from them without turning them off." - I did that with IBM pSeries servers decades ago and with commodity Linux servers running on x86-64 hardware within the last couple of years. That's not reserved for mainframes.
- cat199 7y agoagree those particular technologies are not now mainframe exculsive - however mainframe grade systems allow switching / reconfiguring all components on line. E.g. plug in a new processor unit (e.g one of N processor racks plugged into the system bus), new IO unit, new disk unit, replicate all data, move all jobs, decouple the old one so that after the operation is complete 0% of the old hardware is running and 100% new, with no downtime.