Consistency

In the context of distributed systems.

• a measure of how consistent a system is when it comes to accessing data, in terms of producing the most recent and correct data.
• a definition popularized by the definition for cap-theorem.
• follows several main consistency-patterns.
  • when talking about consistency in the context of cap-theorem, we typically mean linearizability.
• can be challenging to achieve in a system due to network-asynchrony.

In the context of databases.

• guarantee that operations only move the database from one valid state to another.

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References.

Categories:: distributed-systems, database