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The CAP Theorem is an important foundation for understanding distributed systems. Summarizing all the available literature on CAP and some modern interpretations of the theorem
Consistency - The same request returns the same data at both T1 and result of a read at T1 is the same as T2 if there were no writes between T1 and T2. Basically, any read can see any previously completed write.
- Availability - The system is
- Partition Tolerance - blahThe system is able to maintain its guarantees If a network failure prevents communication between some nodes, the system
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Wikipedia defines Consistency as all nodes see the same data at the same time, but that is incorrect because the CAP Theorem is defined in terms of the observed rather than actual state of the system. |
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