CHAPTER 9

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Consistency Models

For changes to be of any true value, they’ve got to be lasting and consistent.

—Tony Robbins, motivational speaker

Consistency is contrary to nature, contrary to life. The only completely consistent people are dead.

—Aldous Huxley

One of the biggest factors powering the nonrelational database revolution is a desire to escape the restrictions of strict ACID consistency. It’s widely believed that the new breed of nonrelational databases provide only weak or at best eventual consistency, and that the underlying consistency mechanisms are simplistic. This belief represents a fundamental misunderstanding of nonrelational ...

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