A system includes a network and multiple network devices. The network devices run instances of various services. If a particular network device becomes inaccessible, the system is capable of replacing the services instances running on the inaccessible network device by initiating new service instances...http://www.google.com.hk/patents/US7860957?utm_source=gb-gplus-share專利 US7860957 - System and method for managing network services in a distributed system
