系统介绍了科学数据网格(SDG)项目“十一五”以来的一些研究进展,重点阐述了SDG数据传输技术的改进以及SDG数据访问中间件(DAS)向IPv6迁移的关键技术的分析和实现,介绍了针对SDG“两步查询”数据查询模式的局限性而提出的集成移动agent的新查询模式,并对其作了简要分析,最后对SDG系统的进展进行总结并指出了下一步的工作方向。
This paper introduced some progress in SDG since the CAS llth Five-year Program. Firstly,analyzed the key technologies of improvements in SDG data transferring and how to port SDG middleware(DAS) to IPv6. Then introduced the novel data query model which integrated mobile agent in SDG system to solve the problem of two steps data query model of SDG. Finally concluded a summary of this scheme and indicated the future research direction of SDG.