Formal Verification Of Pastry Using TLA+

Tianxiang Lu 1, 2 Stephan Merz 1, 3, 4 Christoph Weidenbach 1, 2
1 VERIDIS - Modeling and Verification of Distributed Algorithms and Systems
LORIA - FM - Department of Formal Methods , Inria Nancy - Grand Est, MPII - Max-Planck-Institut für Informatik
3 MOSEL - Proof-oriented development of computer-based systems
LORIA - FM - Department of Formal Methods
Abstract : Pastry is an algorithm that provides a scalable distributed hash table over an underlying P2P network. Several implementations of Pastry are available, but to the best of our knowledge the correctness of the algorithm has not been verified formally. Since Pastry combines rather complex data structures, asynchronous communication, concurrency, resilience to churn and fault tolerance, we believe that it makes an interesting target for verification using TLA+. More precisely, our goal is to model the join and lookup protocols of Pastry using the TLA+ language, and to use the associated tools to verify significant correctness properties.
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Submitted on : Monday, December 24, 2012 - 11:43:56 AM
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Tianxiang Lu, Stephan Merz, Christoph Weidenbach. Formal Verification Of Pastry Using TLA+. International Workshop on the TLA+ Method and Tools, Aug 2012, Paris, France. ⟨hal-00768812⟩

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