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Implementation and Evaluation of a Middleware for Self-Organizing Decentralized Web Services

  • Constantin Adam
  • Rolf Stadler
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3996)

Abstract

We present the implementation of Chameleon, a peer-to-peer middleware for self-organizing web services, and we provide evaluation results from a test bed. The novel aspect of Chameleon is that key functions, including resource allocation, are decentralized, which facilitates scalability and robustness of the overall system. Chameleon is implemented in Java on the Tomcat web server environment. The implementation is non-intrusive in the sense that it does not require code modifications in Tomcat or in the underlying operating system. We evaluate the system by running the TPC-W benchmark. We show that the middleware dynamically and effectively reconfigures in response to changes in load patterns and server failures, while enforcing operating policies, namely, QoS objectives and service differentiation under overload.

Keywords

Application Server Service Selection Server Failure Service Class Load Pattern 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Constantin Adam
    • 1
  • Rolf Stadler
    • 1
  1. 1.Laboratory for Communication NetworksKTH Royal Institute of TechnologyStockholmSweden

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