We are a 1000-2000 person company and we have probably on the order of $100M of servers and data centers and whatnot, and I think we spend about 2/3rds of that every year on power/maintenance/rent/upgrades/etc. We don't generally trust cloud providers to meet our requirements for: * uptime (network and machine - both because we are good at reliability [and we're willing to spend extra on it] and because we have lots…
> because we have lots of fancy redundant infrastructure that we can't rely on from cloud companies) Haha. This can't possibly be true.
I've seen on-premises, where reliability wasn't even objective machines that easily run for 5+ or more years without any interruption. Now parent said that they actually need reliability and you can achieve it using many technologies. Starting with RAID, dual PSU, or even hot swappable RAM or CPU (I remember SPARC machines allowed this). With full control of networking you can also make a standby node take over nearly instantaneous, when in AWS it might take couple minutes. You can achieve nearly any availability as long as you have enough money. In AWS you don't have any control and your only way is through designing your application in specific ways and that still has limitation. Just take look at RDS when everyone would want to have it instantaneous, but it usually will take few minutes.