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