When you deploy the mass ingestion specification, you isolate the specification from changes in the Mass Ingestion tool. For example, you deploy the mass ingestion specification to a Data Integration Service. After testing the ingestion output, you edit the mass ingestion specification. The changes that you make to the mass ingestion specification do not affect the deployed specification.

After you deploy the mass ingestion specification, you can redeploy the specification using a different Hadoop connection or you can redeploy the specification to a different Data Integration Service.