HydraBase – The evolution of HBase@Facebook

Introduced HydraBase, a system that enhances HBase reliability by using a quorum-based approach with RAFT consensus for region hosting. This allows for faster failover and higher availability compared to traditional HBase primary-secondary setups, by having multiple region servers synchronously write to the WAL and tolerating up to F failures in a 2F+1 quorum. HydraBase enables failover at the granularity of a single region and reduces failover time by eliminating log splitting.