Thursday, September 25, 2008

Redundancy and unreliable software

Redundancy is often a great thing to have and has save many a production environments. However, redundancy works if the underlying hardware and software work. Making an unreliable environment redundant simply means that the redundant system is unreliable too. Failing over from one failing environment to another that will fail is not going to help availability.

Therefore, the best thing to do is to make sure that the system being copied is reliable in and of itself.

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