Infosphere Datastage server-side tracing is enabled and disabled in project properties in the tracing tab of the Datastage Administrator.
By default, server side tracing is disabled, because normally tracing is a system resources consuming option and causes a lot of server overhead.
When the server-side tracing is enabled, the information about all datastage server activity is recorded and written to trace files.
It is strongly recommended to use tracing only by experienced Datastage users or with the help of Datastage customer support.