Multi-Paxos vs Strong-Sync Primary/Replica vs Raft: Which HA Model Actually Gets You RPO=0 in 2026?

The article explains how quorum-based Multi-Paxos replication can preserve committed writes and achieve zero committed data loss in certain failure scenarios.

Using OceanBase as an example, it shows how log-stream consensus helps avoid split-brain while maintaining high availability across failures.

It compares this approach with strong synchronous primary/standby replication, which can protect against data loss but may reduce availability.

Raft is also used as a reference point to clarify leader election, majority quorum, and how different systems handle RPO=0 claims.