[skyde]

Paxos and Raft are consensus algorithms that provide certain guarantees and capabilities that a master-slave system with synchronous replication, such as PostgreSQL, cannot offer.

These algorithms ensure that a majority of nodes (a quorum) must agree on any proposed chAnge. This agreement guarantees that once a decision is made (e.g., to commit a transaction), it is final and consistent across all nodes. This strong consistency is critical in distributed systems to avoid split-brain scenarios.

This is easily caused by :

1-network partition

2-latency issues.

3-Async failover (2 nodes think they are the master)

4-replica lag (some but not all replica acknowledged the write) while master send confirmation to client