Application-based dynamic primary views in asynchronous distributed systems

  • Authors:
  • Alberto Bartoli;Ozalp Babaoglu

  • Affiliations:
  • Dipartimento di Elettrotecnica, Elettronica, Informatica, University of Trieste, Via Valerio 10, 34100 Trieste, Italy;Department of Computer Science, University of Bologna, Mura Anteo Zemboni 7, 40127 Bologna, Italy

  • Venue:
  • Journal of Parallel and Distributed Computing
  • Year:
  • 2003

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Abstract

We consider programming network applications that are based on the process group paradigm. When such applications are deployed in unreliable networks, they may partition into several disconnected clusters causing multiple views of the group's current composition to exist concurrently. In this paper we propose a mechanism for efficiently deciding when a view constitutes the "primary partition" for the group. Our solution is highly flexible and has the following features: possibility to modify selection rules at run-time without having to halt and restart the application: support for dynamic groups whose membership may change not only due to failures recoveries but also due to processes voluntarily joining and leaving; ability to re-establish a primary partition even after a "total failure" scenario where all group members crash. These features facilitate the development of partition-aware applications that are capable of "adapting" themselves to their operating environment by establishing selection rules based on observed execution characteristics.