Any organisation that wishes to be classed in any way professional knows that the value in it's databases has to be protected. That requires them to have the means to recover the data if something bad happens. A hot-mirrored copy is simply not good enough (one corruption would get written to both copies).
As a consequence, the size of commercial databases is limited by the amount of time the organisation is willing to have it unavailable while it is restored, in the case of
When various Important People are standing behind you making "supportive" noises, while other people are coming by every 5 minutes to ask "Is it fixed yet?", you'll start to realize that restore time is very important, and that disk I/O is pathetic, and tape is overrated.
the only *real* barrier is backup time (Score:5, Interesting)
Any organisation that wishes to be classed in any way professional knows that the value in it's databases has to be protected. That requires them to have the means to recover the data if something bad happens. A hot-mirrored copy is simply not good enough (one corruption would get written to both copies).
As a consequence, the size of commercial databases is limited by the amount of time the organisation is willing to have it unavailable while it is restored, in the case of
Re:the only *real* barrier is backup time (Score:2)
When various Important People are standing behind you making "supportive" noises, while other people are coming by every 5 minutes to ask "Is it fixed yet?", you'll start to realize that restore time is very important, and that disk I/O is pathetic, and tape is overrated.