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Study of Directory Service in Migrating Workflow System

Author: DuXiaoHui
Tutor: ZengGuangZhou
School: Shandong University
Course: Applied Computer Technology
Keywords: Migrating Workflow LDAP Hybrid directory service Neighbor recommended Dynamic adaptability
CLC: TP311.52
Type: Master's thesis
Year: 2009
Downloads: 21
Quote: 0
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Abstract


Migrating workflow is a new technology of mobile computing technology for workflow management, particularly suited to the need to frequently transfer large amounts of data, and call the remote service requires a lot of distributed concurrent processing. The migration workflow management system framework by migrating workflow management engine, migration instance and work location of the three elements. The migration workflow management engine complete workflow process definition, migration instance generation and multi-migrating instance coordination; work position including dock server and its associated network stops server is migrated instance running, working machine to migrate instance to provide a variety of workflow service, the actual execution of the workflow service establishments; migrating instances perform the main task to build based on the Mobile Agent technology. Travel Fig migrating workflow system support migrating instances work effectively on the basis of the Travel map includes two types: static travel map and dynamic travel Figure. Static travel map generation, in migrating workflow design stage poor for change adaptability; Dynamic Travel Figure constantly revised during the run, able to adapt to changes in the work location and service. The the travel map generated depends on the status of the work location and the services provided, so the need for a mechanism migrating workflow system to manage information, and provide a fast and efficient queries on such information. The directory service is an effective information management tools developed in recent years. In this paper, based on the analysis of traditional directory service and the lightweight directory access protocol LDAP migrating workflow system directory service. Directory services in migrating workflow system needs to have the following basic characteristics: 1) mixed-directory service structure. Directory information distributed storage, balancing the burden of migrating workflow management engine and work location, but also to avoid a single point of failure and terminate the system running: the need to provide centralized management of global information and rapid query. 2) dynamic adaptability. Migrating workflow system is a distributed system may change at any time, work location and its services, directory services need to be able to reflect this change in a timely manner. 3) concurrency. Migrating workflow system directory service must be able to multi-migrating instance concurrent queries provide rapid response. 4) Reliability. Directory information by accidental damage, fast self-recovery. This paper presents a hybrid directory service model and architecture for the special needs of migrating workflow system directory services, and directory services components for detailed design and implementation. Experimental results show that the directory service in migrating workflow system proposed in this paper not only support the migration static instance travel map planning, and support for dynamic correction based on neighbor recommended migration route and service navigation, thus greatly improving the migrating instance travel map dynamic adaptability. Migrating workflow is a new research direction in migrating workflow system directory service needs further research. The next work of this paper is to study the synergistic directory service model in migrating workflow management system and its implementation method to support multi location of migrating instances of collaboration services recommended to optimize migrating instance itinerary.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer software > Program design,software engineering > Software Engineering > Software Development
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