17.4. ACID Transactions

Traditionally, transaction processing systems support ACID properties. ACID is an acronym for Atomic, Consistent, Isolated, and Durable. A unit of work has traditionally been considered transactional only if the ACID properties are maintained, as describe in ACID Properties.

ACID Properties

The transaction executes completely, or not at all.
The effects of the transaction preserve the internal consistency of an underlying data structure.
The transaction runs as if it were running alone, with no other transactions running, and is not visible to other transactions.
The transaction's results are not lost in the event of a failure.