Network - Message Delivery Properties (multiplicity)

Map Of Internet 1973


message delivery multiplicity


At most once [0,1]

  • Messages may be lost
  • Messages never delivered

At least once [1..n]

  • Messages will never be lost
  • but messages may be redelivered

Exactly once [1]

  • Messages are never lost
  • Messages are never redelivered
  • Perfect message delivery
  • Incurs higher latency for transactional semantics

Documentation / Reference

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Event Centric Thinking
Stream - Message (Event)

A message is the atomic unit of data in a stream Event time = when it happens Processing time = when it's processed tuples

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