Can anyone comment on how this compares to postgres-BDR? I'm in the market for an asynchronous multi-master RDBMS to cope with a dozen masters and huge (~800ms

Can anyone comment on how this compares to postgres-BDR? I'm in the market for an asynchronous multi-master RDBMS to cope with a dozen masters and huge (~800ms) latencies - i think my best bets are either BDR or maybe the Cassandra storage engine for MariaDB.