Configuration Requirements for the WAL File Shipping Without Shared Storage Configuration

For the WAL file shipping without shared storage configuration, the rsync utility is required. As an additional requirement, you need to link some PostgreSQL configuration files outside the PGDATA directory. Otherwise these files are destroyed during the resilvering of the primary database. Information about how to perform these steps is available in the comments of the resilver1 script. The PostgreSQL users on both nodes require a nonpassword login on each node.