Atomicity, Consistency, Isolation, Durability (ACID)

ACID - You probably won’t bump into this one unless you are already well into database technicalities, but it is good to know it.

ACID stands for Atomicity, Consistency, Isolation, Durability – all features you’d expect from your database; harder to achieve on the new set of NoSQL databases.

    * Atomicity – a transaction made on the database succeeds or fails as a whole – no interim state (best example is a bank transfer – when it fails, you want the money to stay in your account and not live in limbo-zone)
    * Consistency – at all times, the database should stay in a valid state
    * Isolation – if transactions are executed concurrently, they should execute as if they run sequentially one after the other (they see no mid-states of the database)
    * Durability – once a transaction is committed – it succeeded, no matter what happens next to the database (think crash)

[Category=Big Data ]

Tsahi Levent-Levi, 14 November 2013 09:17:06, http://bloggeek.me/my-big-data-glossary/