Abstract: The aim of this paper is to solve the problem of sharing the current mass satellite resources with high efficiency. Satellite resources integration is realized with the distributed system. Every satellite data center constructs its directory service based on field knowledge ontology, and then the system integrates these directories to a virtual global directory, which is shared by all the satellite data centers and provides support for resources quickly searches of users. The paper designs the layered system architecture, which includes the load balance layer, front-end cache layer, application service layer, database cache layer and database application layer, and performance of the system has a linear growth by adding servers in application service layer simply, which solves the problem of high concurrent. The simulation results show that the system can realize resources sharing of different data centers, and has a good performance on high concurrent.

Key words: high concurrent, data sharing, distributed system, satellite resources

摘要： 针对当前海量卫星资源难以高效共享的问题，采用分布式架构实现卫星资源的整合。各卫星数据中心依据本领域的知识本体构建目录服务，之后系统进行整合为虚拟全局目录供各个数据中心共享，为用户快速查找所需资源提供支持；设计了分层的系统架构，包括负载均衡层、前端缓存层、应用服务层、数据库缓存层和数据库应用层，通过在应用服务层简单添加服务器就可以使系统性能线性增长，很好地解决了高并发访问的问题。仿真实验结果表明，系统能够实现不同数据中心的资源共享，高并发访问性能良好。

关键词: 高并发访问, 据共享, 分布式系统, 卫星资源