Paper
2011
Zab: High-performance broadcast for primary-backup systems
Flavio P. Junqueira, Benjamin C. Reed & Marco Serafini
Describes the atomic broadcast protocol behind ZooKeeper, built around a primary that establishes an order once and lets followers simply replay it, rather than Paxos's per-value agreement.
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FreeAdvancedlink checked 17 Sept 2026
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Not a difficulty warning — a route. These are in the library too.
Filed under Distributed Systems in Computer Science.