If you are performing a planned failover then the old master can be turned into a slave without extra tools or steps. Simply shut down the master first. As part

If you are performing a planned failover then the old master can be turned into a slave without extra tools or steps. Simply shut down the master first. As part of this process it waits until the slave has the necessary wal. pg_rewind will be great for remastering under other scenarios (unexpected failovers, etc.)