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The authors describe a technique for writing distributed applications which manage themselves over one or more utility computing infrastructures: by dynamically acquiring new computational resources, deploying themselves on these resources, and releasing others when no longer required. Unlike prior work, such management functionality is closely integrated with the application, allowing greater freedom in application-specific policies and faster response to failures and other changes in the environment without requiring any external management system. They address the programming complexity of this approach by applying constraint logic programming, and describe Rhizoma, an experimental runtime to explore these ideas.
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