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From my understanding, the consistency in ACID is ensuring the data integrity.

However, the consistency in CAP means the data can appear quickly in distributed system.

Does that mean: they are not the same concept?

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up vote 4 down vote accepted

They are not really the same, because of the scope of the data



  • Consistency (All Nodes Have Same Data via Eventual Consistency)
  • Availability
  • Partition-Tolerance : system continues to operate despite arbitrary message loss or failure of part of the system


  • ACID addresses an individual node's data consistency
  • CAP addresses cluster-wide data consistency
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Eventual. Eventual should have been in bold, Rolando. It's the deal-breaker :) Happy New Year! –  tblPhil Jan 1 '13 at 4:30

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