Unlike "C" and "A" in "CAP," "AC&D" (specifically, "C") can't be easily separated from "I". Serializability ("I") ensures that database consistency, or mainten

Unlike "C" and "A" in "CAP," "AC&D" (specifically, "C") can't be easily separated from "I". Serializability ("I") ensures that database consistency, or maintenance of integrity constraints ("C"), is not violated. While it's possible to get consistency ("C") without serializability (which would give up traditional "I" in favor of a weaker form of isolation), it's often difficult [see http://www.bailis.org/blog/when-is-acid-acid-rarely/#arbitrary-note http://www.bailis.org/blog/when-is-acid-acid-rarely/#arbitra...].