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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 |
