WestminsterResearch

Maintaining consistency properties of grid workflows in collaborative editing systems

Sipos, Gergely and Kacsuk, Peter K. (2009) Maintaining consistency properties of grid workflows in collaborative editing systems. In: Eighth international conference on grid and cooperative computing. GCC 2009. IEEE, pp. 168-175. ISBN 9780769537665

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Official URL: http://dx.doi.org/ 10.1109/GCC.2009.72

Abstract

Real-time collaborative editing systems allow a group of users to view and edit the same item at the same time from geographically dispersed sites. Consistency maintenance in the face of concurrent accesses to shared entities is one of the core issues in the design of these systems. The paper introduces a locking based approach that grid application developer environments can apply to protect the consistency properties of workflows during collaborative editing scenarios. We developed two pessimistic locking algorithms to assure that under no circumstances can application developers break the acyclic criteria of workflow graphs or add invalid edges to them. We prove that the algorithms result consistent graphs, moreover, do not result the cancellation of any userpsilas editing transaction. We see that the second, improved algorithm gives much better performance in terms of number of concurrent users that can work on a graph.

Item Type:Book Section
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:11069
Deposited On:07 Aug 2012 11:59
Last Modified:07 Aug 2012 11:59

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