一种基于数据网格的动态副本管理策略研究

 副本管理是数据网格中的一个研究热点,它能提高网格环境中数据的可获得性和容错性.在对传统数据网格中主流的副本管理技术进行深入研究后,提出了一种基于数据网格的动态副本管理策略,该策略包含能根据文件访问热度自动增加副本的动态副本创建方法、基于GridFTP的副本选择方法和结合副本创建时间、访问次数、副本文件大小的副本置换方法.仿真实验结果表明,当用户对资源的访问具有时间相关性时,提出的动态副本管理策略与OptorSim网格仿真器内置的5种副本管理策略相比有着较大的性能优势.

A research of dynam ic replication management strategy based on data grid

Replication management has become a hot research area in data grid.It has improved availability and fault tolerant of data in grid computing environment.This paper proposed a management strategy of the dy-nam ic replication to the datagrid on the basis of deep research of the mainstream of replication management tech-nology from trad itional datagrid.Replication management strategy contains the creation method of dynam ic repli-cation that can automatically increase replication accord ing to the frequency of the access file,the selection meth-od of replication based on the GridFTPand the replacementmethod of the replication combine with the establish-ment time,access times and file size.The simulation experiments ind icated that comparing the management strate-gy of dynam ic replication with the five kinds of replication management strategy in the OptorSim grid simulator,the new strategy exhibited much more performance advantages with the resource access relate to time.