galera is not a solution for scaling out writes, full stop galera has lower max writes/sec than a traditional async single master because it's a cluster. the o

galera is not a solution for scaling out writes, full stop galera has lower max writes/sec than a traditional async single master because it's a cluster. the other members of the cluster need to ack the writes, and all members are doing all the writes, so adding machines does not increase your max writes