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atomicity, consistency, isolation, durability

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Also known as ACID properties, ACID transactions, ACID rules, ACID, ACID model, atomicity, consistency, isolation, and durability

In computer science, ACID (atomicity, consistency, isolation, durability) is a set of properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. For example, a transfer of funds from one bank account to another, involving multiple changes such as debiting one account and crediting another, is a single transaction.

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~12 min read

Article

15 sections
Contents
  • Characteristics
  • Atomicity
  • Consistency
  • Isolation
  • Durability
  • Examples
  • Atomicity
  • Consistency failure
  • Isolation failure
  • Durability failure
  • Implementation
  • Locking vs. multiversioning
  • Distributed transactions
  • See also
  • References

In computer science, ACID (atomicity, consistency, isolation, durability) is a set of properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. For example, a transfer of funds from one bank account to another, involving multiple changes such as debiting one account and crediting another, is a single transaction.

In 1983, Andreas Reuter and Theo Härder coined the acronym ACID, building on earlier work by Jim Gray who named atomicity, consistency, and durability, but not isolation, when characterizing the transaction concept. These four properties are the major guarantees of the transaction paradigm, which has influenced many aspects of development in database systems.

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