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

Short summary

Distributed consensus protocols like Paxos, Raft, and Multi-Paxos solve the split-brain problem differently: quorum-based systems allow continued operation during minority failures, while strong-sync replication sacrifices availability for safety. OceanBase's Multi-Paxos implementation achieves RPO=0 (zero data loss) by requiring log entries to persist on a majority of replicas before commit. Multi-Paxos offers more flexibility than Raft for geographic distribution and latency optimization, enabling both data safety and write availability simultaneously.

• •Paxos and Multi-Paxos prevent split-brain through quorum-based majority agreement
• •Quorum consensus enables both RPO=0 and continued availability during minority failures
• •Multi-Paxos provides geographic flexibility and latency optimization that Raft and strong-sync cannot match

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