Efficient Management of Fragmented Replica in Data Grids

被引:1
作者
Wu, Chao-Chin [1 ]
Lai, Lien-Fu [1 ]
Lai, Jia-Xian [2 ]
机构
[1] Natl Changhua Univ Educ, Dept Comp Sci & Informat Engn, Changhua, Taiwan
[2] Natl Changhua Univ Educ, Comp Sci & Informat Engn, Changhua, Taiwan
关键词
Co-Allocation; Data Grid; Data Retrieval; Fragmentation; Replica Selection;
D O I
10.4018/jghpc.2012040105
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
Rather than replicating a file completely, Chang et al. proposed a fragmented replication technique to cope with the problem that only partial content of the replica are required in a local application. Furthermore, they also proposed two server selection algorithms for replica retrieval. However, their algorithms do not always find an optimal solution. To address the problem, in this paper, the authors propose a replica selection algorithm to improve the fragmented replica retrieval efficiency in this paper. It is a heuristic considering not only the transmission time but also the number of available servers for each block. Simulation results show that the proposed algorithm can improve the retrieval efficiency up to 12%.
引用
收藏
页码:63 / 70
页数:8
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