Their implementation allows new services to be added or replaced without taking down a site for reconfiguration and allows a VO to respond effectively to dynamic resource availability and demand. But the implementation is based completely on Tomcat’s container-level deployment capability, which suffers from poor performance. These and a few other projects [32], [33] are the main dynamic deployment efforts for Grid applications. Some of them clearly are not intended for a WSRF-enabled service-oriented architecture. Moreover, although some have implemented service-oriented dynamic deployment, they do not address in detail the cost, namely, the capability brought from dynamic deployment itself and the availability in dynamic Grid environments.