By Keng Siau (Editor)

The booklet offers the most recent study principles and subject matters on the right way to increase present database platforms, increase details garage, refine latest database versions, and advance complicated functions. It presents insights into vital advancements within the box of database and database administration. With emphasis on theoretical concerns concerning databases and database administration, the booklet describes the functions and contours of latest applied sciences and methodologies, and addresses the wishes of database researchers and practitioners. *Note: This ebook is a part of a brand new sequence entitled "Advanced issues in Database Research". This e-book is quantity 3 inside this sequence (Vol. III, 2004)"

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Extra info for Advanced Topics in Database Research (vol. 4)

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3 seconds for A2 without delays (0% in Figure 22). Hence, workflow restructuring can be a way to improve performance of workflow instances when their workflow models do not explore all possible concurrency among activities. When considering the workflow models to reflect the organizational structure, among other aspects, the restructuring approach presented in this chapter enables the optimization of a company business process without necessarily reengineering the enterprise. IMPLEMENTATION CONSIDERATIONS We first describe briefly the implementation efforts concerning the ActivityFlow specification language.

This component is built on top of the DIOM prototype system, an adaptive query mediation system for querying heterogeneous information sources (Lee, 1996). To adapt our implementation architecture to the open system environment, we allow a flexible configuration of the actor interface, the workflow engine Copyright © 2005, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of Idea Group Inc. is prohibited. TEAM LinG Dynamic Workflow Restructuring Framework for Long-Running Processes 43 base, and the distributed object manager.

5 seconds corresponds to delay of 100%. It means a very narrow gain on C restructuring, and only delays not greater than 4% are properly managed with C restructuring at start. Experiment 2: Unexpected malfunction of infrastructure component The goal of this experiment is to examine the pros and cons of dynamic workflow restructuring, when the run-time environment presents some disturbance and the restructuring of activities takes place during the execution of WI. The disturbances are detected at 25% checkpoint.

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