面向云计算的工作流技术

云计算的发展,对提高服务质量与压缩运行成本提出了新的要求.在此背景下,工作流技术被认为是一种较为优越的解决方案:从云计算用户的角度看,工作流提供了对复杂应用的抽象定义、灵活配置和自动化运行；从云计算服务提供者的角度看,工作流实现了任务的自动调度、资源的优化和管理.文章介绍工作流技术与云计算；阐述了云工作流产生的背景；深入剖析了云工作流的技术特征以及与其他工作流(业务工作流、网格工作流)的异同；列举了云工作流的4个实现案例,并对其进行比较.最后,在总结全文的同时,展望了云工作流技术的发展前景.

Cloud Computing Oriented Workflow Technology

Along with the development of Cloud Computing,improving OoS(Quality of Service) as well as reducing OC(Operation Cost) is increasingly becoming an urgent goal.Cloud-oriented workflow technology is now regarded as a pretty good solution: For users of could computing,cloud workflow enables a complex application instance to be Abstractly defined,flexibly configured and auto-operated;for enterprises who provide cloud services,cloud workflow brings them auto-scheduling of tasks,optimization and management of computing resource.This paper proposed a short introduction to the technology of both workflow and Cloud Computing;Introduced the background in which Cloud Workflow generated;Meanwhile,the following part fully compared Cloud Workflow with other workflows(Business Workflow and Grid Workflow) according to the technical characteristics of workflow;After that,4 instances of Cloud Workflow management system are listed,as well as their similarities and differences.At the end of this paper,a summary,and predicted the possible trend of Cloud Workflow in the future are given.