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Three machines get you availability that one machine can't.
by erik_seaberg 3y ago
Three machines get you availability that one machine can't.
- ethanwillis 3y agoThat is not strictly true and entirely depends upon the machines in question.
- erik_seaberg 3y agoTrue, I'm assuming commodity hardware. I've never had the privilege of working on really high end systems, but my impression is that you buy or lease a cluster in a box that is simulating one reliable computer.
- ocdtrekkie 3y ago"The more they overthink the plumbing, the easier it is to stop up the drain." - Scotty, and good IT people everywhere. When you add all of the necessary layers of abstraction to get three computers to act as one computer, you added dozens of new points of failure. In the conventional case, yeah, you can now shut one down and people aren't impacted. But there's now a bunch of new ways it can break and take the system down and it is much harder to figure out why.
- wmf 3y agoThe question is whether you need active-active or if failover will be enough.