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Distributed Computing on Distributed Memory

  • Andreas PrinzEmail author
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11150)

Abstract

Distributed computation is formalized in several description languages for computation, as e.g. Unified Modeling Language (UML), Specification and Description Language (SDL), and Concurrent Abstract State Machines (CASM). All these languages focus on the distribution of computation, which is somewhat the same as concurrent computation. In addition, there is also the aspect of distribution of state, which is often neglected. Distribution of state is most commonly represented by communication between active agents. This paper argues that it is desirable to abstract from the communication and to consider abstract distributed state. This includes semantic handling of conflict resolution, e.g. in connection with data replication. The need for abstract distribution of state is discussed and a novel semantics for concurrency based on an abstract distributed state is presented. This semantics uses runs over so-called multistates, and hides the internal communication for replica handling. This way, distributed computation is described over an abstract memory model.

Notes

Acknowledgements

This work benefited from many discussions with Egon Börger and Klaus-Dieter Schewe. In particular, the modelling of Cassandra in CASM is joint work with them. I am grateful for the helpful comments of the anonymous reviewers.

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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Department of ICTUniversity of AgderAgderNorway

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