If you intend to use the key cross-reference and echo suppression services to perform data synchronizations, you must store the cross-reference keys and the latching status information in the embedded internal database or in an external RDBMS. Integration Server writes cross-reference data to the embedded internal database by default. If you want to store the key cross-reference information in an external RDBMS, you must create the Cross Reference database component and connect it to a JDBC connection pool. For instructions, see Installing Software AG Products.

For more information about the key cross-reference and echo suppression services, see Synchronizing Data Between Multiple Resources.