\! @abs_bindir@/gs_guc set -D @abs_srcdir@/tmp_check/datanode1/ -c "wal_level=hot_standby"
NOTICE: If you need to copy the data stream for WAL log archiving and standby machine. You must be set to the parameter with archive or hot_standby. If this parameter is setted to archive. The hot_standby must be setted to off, otherwise it will cause the database can not be started, at the same time the max_wal_senders must be set at least 1.
--?realpath.*
expected instance path: [@abs_srcdir@/tmp_check/datanode1/postgresql.conf]
gs_guc set: wal_level=hot_standby: [@abs_srcdir@/tmp_check/datanode1/postgresql.conf]

Total instances: 1. Failed instances: 0.
Success to perform gs_guc!

\! @abs_bindir@/gs_guc set -D @abs_srcdir@/tmp_check/datanode1/ -c "wal_level=on"
NOTICE: If you need to copy the data stream for WAL log archiving and standby machine. You must be set to the parameter with archive or hot_standby. If this parameter is setted to archive. The hot_standby must be setted to off, otherwise it will cause the database can not be started, at the same time the max_wal_senders must be set at least 1.
ERROR: The value "on" is outside the valid range(minimal,archive,hot_standby,logical) for parameter "wal_level".
ERROR: The value "on" for parameter "wal_level" is incorrect.
Try "gs_guc --help" for more information.
\! @abs_bindir@/gs_guc set -D @abs_srcdir@/tmp_check/datanode1/ -c "wal_level=''"
NOTICE: If you need to copy the data stream for WAL log archiving and standby machine. You must be set to the parameter with archive or hot_standby. If this parameter is setted to archive. The hot_standby must be setted to off, otherwise it will cause the database can not be started, at the same time the max_wal_senders must be set at least 1.
ERROR: The value "" is outside the valid range(minimal,archive,hot_standby,logical) for parameter "wal_level".
ERROR: The value "''" for parameter "wal_level" is incorrect.
Try "gs_guc --help" for more information.