Abstract: The aggregation of data from multiple database sites, and the grooming of database after extraction are conducted in a bidirectional process. Using one-way replication, data is aggregated from multiple geo-locations into subscription sets. The aggregate is then mined and the mined data is extracted for analysis, further use, or storage. The aggregated data is then cleaned or groomed to delete the extracted data, and the cleaned data is returned to the geo-locations using a second one-way replication subscription set that replicates the data deletion to the target geo-location. The invention is particularly applicable to transient data that does not require continued storage after extraction.