They also released MyRocks, a RocksDB engine for MySQL which will is being intergrated in MariaDB 10.3 and Percona Server 5.7. I don't think it supports replica

They also released MyRocks, a RocksDB engine for MySQL which will is being intergrated in MariaDB 10.3 and Percona Server 5.7. I don't think it supports replication yet, but it's a start.