Originally Posted by
RevMan2
Any decent data centre has an array of batteries that kick in as soon as one of the main power supplies( you'll normally have 3) fails and keep the machines running until the whacking great diesel generator (kept at operating temperature) takes over. It'll have fuel for the next 48 hours.
And you'll have your core systems mirrored.
This is industry standard.
Err, no. If your climate management has also failed you *want* your system to go down before it cooks itself and turns its drives into pizza.
All of clients have geographically dispersed sys s. Great in the event of physical disaster at one site; the first fallback will kick in seamlessly. If needed, the third is there also. The probl m is not that Jumbo flying into Datacenter one. That's easy to deal with. DC2 will take over, right?
Jumbo jets don't have a habit of flying into datacentres. The real problem is logical errors. Pointer errors in sophisticated relational databases. That type of thing. Once they happen in one site they are faithfully replicated on mirror sites. All becomes useless at a stroke. The concept of sysplexing very large systems only prevents against large physical attacks. Logical ones are not prevented against.