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ThinkMind // International Journal On Advances in Software, volume 4, numbers 3 and 4, 2011 // View article soft_v4_n34_2011_17


Transactional Composition and Concurrency Control in Disconnected Computing

Authors:
Tim Lessner
Fritz Laux
Thomas Connolly
Malcolm Crowe

Keywords: Transaction Management; Disconnected Transaction Management; Advanced Transaction Models; Concurrency Control; Optimistic Concurrency Control; Semantic Concurrency Control

Abstract:
Composition of software components via Web technologies, scalability demands, and Mobile Computing has led to a questioning of the classical transaction concept. Some researchers have moved away from a synchronous model with strict atomicity, consistency, isolation and durability (ACID) to an asynchronous, disconnected one with possibly weaker ACID properties. Ensuring consistency in disconnected environments requires dedicated transaction support in order to control transactional dependencies between software components and provide a scalable concurrency control mechanism. This paper contributes a simple expression language using Boolean operators to define transactional dependencies and further provides rules to derive an execution semantics that could be exploited by a transaction manager to control the interaction. This work also discusses the use of data classes that demarcate data based on concurrency control related aspects and apply a certain concurrency control mechanism to each class. Such a classification allows better trade-off between consistency needs and the overhead caused by the concurrency control mechanism.

Pages: 442 to 460

Copyright: Copyright (c) to authors, 2011. Used with permission.

Publication date: April 30, 2012

Published in: journal

ISSN: 1942-2628

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