About Change Logs

Oracle Internet Directory records each change as an entry in the change log container. A third-party metadirectory solution retrieves changes from the change log container and applies them to the third-party directory. To retrieve these changes, the third-party metadirectory solution must subscribe to the Oracle Internet Directory change logs.

Each entry in the change log store has a change number. The third-party metadirectory solution keeps track of the number of the last change it applied, and it retrieves from Oracle Internet Directory only those changes with numbers greater than the last change it applied. For example, if the last change a third-party metadirectory solution retrieved had a number of 250, then subsequent changes it retrieves would have numbers greater than 250.

Note: If a third-party metadirectory solution is not subscribed to the Oracle Internet Directory change logs, and the first change it retrieves is more than one number higher than the last change it last applied, then some of the changes in the Oracle Internet Directory change log have been purged. In this case, the third-party metadirectory solution must read the entire Oracle Internet Directory to synchronize its copy with that in Oracle Internet Directory.

See Also: "About Connectors and Directory Integration Profiles" for a conceptual discussion of directory integration profiles