In this section, we report on our experience using CoFi to add adaptation-aware editing and progressive update propagation to the Outlook email client and the PowerPoint presentation system. We implement progressive update propagation for both applications. For PowerPoint we also support adaptation-aware editing. The CoFi drivers and policies we implement for Outlook and PowerPoint consist of 2,365 and 3,315 lines of Java code, respectively.
We measure the performance of CoFi on an experimental platform consisting of three 500 MHz Pentium III machines running Windows 2000. Two of the machines are configured as clients and one as a server. Client machines run the user application and the CoFi local proxy. The server machine runs the CoFi remote proxy. Clients and the CoFi server communicate via a fourth PC running the DummyNet network simulator [26]. This setup allows us to control the bandwidth between clients and server to emulate various network technologies. We use our departmental NFS and IMAP servers as the native stores for our experiments with PowerPoint and Outlook, respectively.