The important design issue about building active-active multi-master on the base of raft protocol is about being able to apply changes locally without immediately putting them into a log (without sacrificing durability). MySQL implements a binlog, which is separate from a log, to ensure durability. OrioleDB implements copy-on-write checkpoints and row-level WAL. That gives us a chance to implement MM and durability using a single log.
The important design issue about building active-active multi-master on the base of raft protocol is about being able to apply changes locally without immediately putting them into a log (without sacrificing durability). MySQL implements a binlog, which is separate from a log, to ensure durability. OrioleDB implements copy-on-write checkpoints and row-level WAL. That gives us a chance to implement MM and durability using a single log.