Increasing web service dependability through consensus voting

Authors:
Nik Looker;Malcolm Munro;Jie Xu
Affiliations:
Department of Computer Science, University of Durham, UK;Department of Computer Science, University of Durham, UK;School of Computing, University of Leeds, UK
Venue:
COMPSAC-W'05 Proceedings of the 29th annual international conference on Computer software and applications conference
Year:
2005

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Abstract

This paper demonstrates our Web Service based N-Version model, WS-FTM (Web Service-Fault Tolerance Mechanism), which applies this well proven technique to the domain of Web Services to increase system dependability. WS-FTM achieves transparent usage of replicated Web Services by use of a modified stub. The stub is created using tools included in WS-FTM Our initial implementation includes a simple consensus voter that allows generic result comparison. Finally we show, through the use of a non-trivial example, that WS-FTM can be used to increase the reliability of a Web Service system.