By default, the Integration Service writes session events to binary log files on the node where the service process runs. In addition, the Integration Service can pass the session event information to an external library. In the external shared library, you can provide the procedure for how the Integration Service writes the log events.

PowerCenter provides access to the session event information through the Session Log Interface. When you create the shared library, you implement the functions provided in the Session Log Interface.

When the Integration Service writes the session events, it calls the functions specified in the Session Log Interface. The functions in the shared library you create must match the function signatures defined in the Session Log Interface.