If you have the PowerCenter high availability option, the Logger Service provides restart and failover capabilities.
If the Logger Service or the Logger Service process fails on the primary node, the Service Manager restarts the service on the primary node.
If the primary node fails, the Logger Service fails over to the backup node, if one is defined. After failover, the Service Manager synchronizes and connects to the Logger Service process on the backup node.
For the Logger Service to fail over successfully, the Logger Service process on the backup node must be able to connect to the data source. Include the same statements in the DBMOVER and PowerExchange Logger configuration files on each node.