Checking Whether the WAL_LEVEL Value in the Source Database Is Correct

PostgreSQL Synchronization

**Table 1** Checking whether the WAL_LEVEL value in the source database is correct
Check Item	Whether the WAL_LEVEL value in the source database is correct
Description	Check whether wal_level of the source database is set to logical. If the value is not logical, the incremental logs of the source database cannot be logically decoded. As a result, incremental synchronization cannot be performed.
Failure Cause and Handling Suggestion	Failure cause: The wal_level value in the source database is incorrect. Handling suggestion: Change the wal_level value of the source database to logical. For details about how to modify the parameter for self-built databases, see: Run alter system set wal_level = logical in the source database as a super user and restart the database to apply the changes. Alternatively, modify the postgresql.conf configuration file, set wal_level to logical, and restart the database to apply the changes.
	Failure cause: The source database version is not supported. Handling suggestion: Ensure that the source database version is supported by DRS. Supported source database versions include PostgreSQL 9.4, 9.5, 9.6, 10, 11, 12, and 13.
	Failure cause: The destination database version is not supported. Handling suggestion: Ensure that the destination database version is supported by DRS. The destination database supports the following major versions: RDS for PostgreSQL 9.5, 9.6, 10, 11, 12, and 13. If the source database is RDS for PostgreSQL Enhanced Edition, the destination database supports only RDS for PostgreSQL Enhanced Edition.