System Design
CAP
under partition, pick A or C
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The Cut Phone LineSystem DesignMore terms from this board
- availabilityevery request gets an answer
- consistency (linearizable)everyone sees the latest write, as if one copy
- PACELCadds 'else: latency vs consistency'
- partitionthe network drops messages between nodes (NOT a crash)
- tunable consistencychoose per query via quorum — R + W > N guarantees a read sees the latest write (Cassandra/Dynamo)