Cap theorem

CAP theorem

Consistency        : Every read receives the most recent write or an error
Availability       : Every request receives a (non-error) response, without the guarantee that it contains the most recent write
Partition tolerance: The system continues to operate despite an arbitrary number of messages being dropped (or delayed) by the network between nodes

- When a network partition failure happens should we decide to
	- Cancel the operation and thus decrease the availability but ensure consistency
	- Proceed with the operation and thus provide availability but risk inconsistency

Source: en.wikipedia.org

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