Chapter 5. Replication for High Availability

Buying expensive machines known for their reliability and ensuring that you have a really good UPS in case of power failures should give you a highly available system. Right?

Well, high availability is actually not that easy to achieve. To have a system that is truly available all the time, you have to plan carefully for any contingency and ensure that you have redundancy to handle failing components. True high availability—a system that does not go down even in the most unexpected circumstances—is hard to achieve ...

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