Zab: High-performance broadcast for primary-backup systems

@article{Junqueira2011ZabHB,
  title={Zab: High-performance broadcast for primary-backup systems},
  author={Flavio Paiva Junqueira and Benjamin C. Reed and Marco Serafini},
  journal={2011 IEEE/IFIP 41st International Conference on Dependable Systems & Networks (DSN)},
  year={2011},
  pages={245-256}
}
Zab is a crash-recovery atomic broadcast algorithm we designed for the ZooKeeper coordination service. ZooKeeper implements a primary-backup scheme in which a primary process executes clients operations and uses Zab to propagate the corresponding incremental state changes to backup processes1. Due the dependence of an incremental state change on the sequence of changes previously generated, Zab must guarantee that if it delivers a given state change, then all other changes it depends upon must… CONTINUE READING

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