Built-in multi-master replication is the only real missing piece there, AFAIK every other replication base is covered well natively.<p>Besides that, sync &amp; async replication has been there nicely since 9.2. 9.3 added timeline switches, needed for cascaded slave setups in practice. 9.4 added replication slots so the master can keep track of slave sync status, and the foundations for multi-master &amp; logical replication. 9.5 added pg_rewind which speeds up resyncs.