分布式工作集的实现

Realization of distributed workingset

在实际应用POSC技术过程中 ,由于Epicentre数据模型庞大 ,用户访问数据速度慢 ,查询方向不明确 .利用基于网络的Socket程序设计技术 ,实现了分布式工作集管理机制 .该机制采用主从服务器技术 ,具体数据的存储对用户透明 ,用户根据定义的主题 ,可方便、快速地访问所需的数据 .在确定用户工作集存放的位置时 ,应用了最近最少使用、最短等待时间等策略 ,保证了数据更新的同步 .

In the process of using POSC technology, the Epicentre data model is very huge, users have some difficulties in using it, e. g., too slow to gain access to data, too difficult to decide the search direction. Use program technology of Socket based on network, and the distributed workingset can be realized. By using main\|sub server, the detailed data store is transparent to users. According to the subjects, users can gain access to needed data immediately. In order to determine the position of the users' workingset, we used the least used and the least waiting time strategy, the synchronization of the data update is guaranteed.