If $PGDATA is a mountpoint to get a filesystem, transform it being a Listing during the mounted filesystem. For example: if a filesystem is mounted to /var/lib/psql/data and $PGDATA is set to /var/lib/pgsql/data, change $PGDATA to /var/lib/pgsql/data/information.After all, shielding info longevity on more than one node by default has become a great