Long-lived transaction model based on Agent Concept

我们的研究课题“基于主体概念的长生命事务模型”的目标是构建一个模型，使面向主体的概念下的几个相关处理能够有效地执行。针对本文的研究目标，研究了两种不同的研究观点：1)使长寿命事务有效可执行的框架，以及使处理请求的执行性能得到充分发挥的机制，针对第一种研究观点，提出了三层模型。在该模型中，对长寿命事务进行分层组合，使得上层对应于长寿命事务层，中间层对应于事务层，底层对应于动作层。然而，分层模型存在上层执行对下层执行依赖过强的问题，影响了执行效率。在我们的方法中，一些带有APPRO…的自治代理更多的高级角色被分配给各个层：长期事务层中的管理者；事务层中的执行者；以及操作层中的参与者。管理器控制和管理由用户指示的由多个处理内容组成的处理请求；执行者控制和管理管理器分配的由原子处理单元组成的相应处理内容；执行者实际执行相应的原子处理单元。另一方面，针对充分的执行性能，研究了基于共享数据读写关系的增量式并行处理机制。此外，还研究了建立读写关系的同步问题和实现读写进程间快速数据传输的访问控制问题。与传统的调用/被调用控制结构相比，增量并行处理机制支持读写关系进程间的快速处理效率。这种增量式并行处理机制对于提高处理性能非常有用。较少

Our objective in the research subject "Long-lived Transaction Model Based on Agent Concept" is to compose a model for making several related processings effectively executable under the concept of agent orientation. As for our objective, two different research views were investigated : 1) framework for making long-lived transaction effectively executable, and mechanism for making the execution performance of processing request sufficiently.Concerning with the first research view, we proposed three layers model. In this model, the long-lived transaction is hierarchically composed so that the top layer is corresponded to the long-lived transaction layer, the middle layer is to the transaction layer and the bottom layer is to the action layer. However, the hierarchical model associates with the problem that the execution in the upper layer is too strongly dependent on that in the lower layer and also the execution efficiency is disturbed. In our approach, some autonomous agents with appro … More priate roles are allocated to individual layers : manager in the long-lived transaction layer ; executor in the transaction layer ; and actor in the action layer. Manager controls and manages the processing request, which is composed of several processing contents, indicated from users ; executors control and manage the corresponding processing contents, which are composed of atomic processing units, assigned from manager ; and actors execute practically the corresponding atomic processing unit. On the other hand, with respect to sufficient execution performance, the incremental parallel processing mechanism was investigated on the basis of read-write relationship between shared data. In addition, the synchronization problem to establish read-write relationship, and the access control problem to attain the fast data transfer between read-write processes were also investigated. The incremental parallel processing mechanism supports the fast processing efficiency between processes of write-read relationship in comparison with the conventional calling/called control structure. This incremental parallel processing mechanism was very useful for making the processing performance sufficient. Less