4 ms·
> a lot of BigIron(TM) vendors advertised achieving five-9s by replacing hardware while the OS remained running and continuing service. AS/400's were capable o
by larrik 6y ago
> a lot of BigIron(TM) vendors advertised achieving five-9s by replacing hardware while the OS remained running and continuing service.
AS/400's were capable of that in the 90's (possibly the 80's as well). Heck, they'd call IBM for replacement parts on their own. You'd show up for work and there'd be an IBM guy waiting to be let in. He'd swap out a part with no downtime, and be gone. I've seen machines with uptimes of over a decade with zero on-site IT.
- blhack 6y agoWe had one of these at an old office of mine. I actually think it's really cool.
- pmiller2 6y agoI recall working on some Sun machines with hot-swappable CPUs (and, I assume, disks and other peripherals). If they somehow made memory hot swappable (I'm sure it's possible, just uncommon and/or verrry expensive), with hot swap CPUs and disks, and redundant power supplies, you could tear the machine half apart and it would still keep running. Of course, at that point, once everything is hot swappable, there are generally multiples of everything, so your one machine is really more like multiple machines inside one box than a single discrete machine.