关键词:迁移工作流; 迁移实例; 路线图; 动态适应性; 分布式目录服务
Study of directory services for itinerary dynamic adaptability of migrating instance
DU Xiao-hui, ZENG Guang-zhou, GUO-Lei, GAO-Lei
(School of Computer Science & Technology, Shandong University, Jinan 250101, China)
Migrating workflow is a workflow management model in which the migrating instance moves among working places continuously and executes tasks by using local services. The permitted working places and the traveling order are determined by the itinerary graph predefined for the migrating instance. If some working places break down or local services are changed then migrating workflow can not be executed reliably because the original traveling path within the itinerary graph can not be formed correctly. To solve above problems, this paper proposed a distributed directory service architecture, which not only supported the static planning of itinerary graph, but also supported the dynamic revising of traveling path by recommendation of working place for migrating instance to update the traveling path. The example demonstrats that the directory service components can greatly enhance the dynamic adaptability of itinerary for migrating instance. ......