迁移工作流管理系统中迁移实例组通信机制的研究

迁移实例（MI）是迁移工作流管理系统中的任务执行主体，可以在授权的工作位置上克隆或派生，以支持业务过程的分解和并行。迁移实例连同克隆体和派生体构成一个协作群组。提出了一种基于服务域的迁移实例组通信模型，给出了模型定义及框架结构，论证了通信模式选择的依据，并描述了主要的通信算法。实验表明，该模型在保证消息快速可靠传递的同时,大大减少了带宽占用，节省了节点计算资源，能够适应迁移工作流系统对迁移实例组通信高效性和可扩展性的要求。

Study on group communication mechanism of migrating instances in migrating workflow management system

Migrating Instance (MI) is a task executor in the migrating workflow management system, and can be cloned or derived from authorized work palaces in order to support decomposing and paralleling in business process. Migrating instance together with its clone and derivation composes a cooperative group. In this paper, a migrating instances group communication model based on service domain was proposed. Moreover the model definition and architecture were given, the reason for communication scheme choice was proved, and the key communication algorithms were depicted. The experimental results show that the model not only can ensure the message be transferred fast and reliably, but also can save the network bandwidth and computing resources of nodes dramatically, therefore the model can meet the requirements of high-efficient quality and scalability in migrating workflow system.