We are using the replication slot and pg_rewind feature of postgresql 9.6
Our cluster consists of 1 master and 1 slave node.
The replication slot feature allows the master to keep as much WAL as is required by the slave.
The pg_rewind command uses WALs to bring the slave in sync with the master.
By using replication slots there are always enough WAL in the pg_xlog.
In this case is it safe to use pg_rewind without WAL archiving?
Can there be a situation where pg_rewind fails?
Regards, Subhro
