A major U.S. retailer has thousands of stores, and wanted to integrate the point-of-sale processing for its existing ACI BASE24 application with a new AJB point-of-sale application as it rolled out new stores or upgraded existing stores. The BASE24 application runs on NonStop SQL and the AJB application runs on Linux/Oracle RAC. This challenge required bi-directionally integrating an active/active heterogeneous database environment across the ACI BASE24 NonStop SQL database and the Linux-based Oracle RAC database as the applications actively run in each environment. The retailer turned to Shadowbase Streams to integrate the distinctly different applications by mirroring key parts of the NonStop SQL and Oracle databases. Each store now has local access to all sales, refund, and exchange activities so that any customer is easily serviced at any store. The retailer completed the integration without any downtime of the application services to its customers or stores.