our acks are similar to kafka in that regard. acks=0,1 leader acknowledgement. acks=-1 we go further like denis mentioned above by 'flushing' to disk before re

our acks are similar to kafka in that regard. acks=0,1 leader acknowledgement. acks=-1 we go further like denis mentioned above by 'flushing' to disk before responding which is stronger (log completeness guarantee from raft) than available in upstream.