Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2006, Vol. 29 ›› Issue (4): 41-44.doi: 10.13190/jbupt.200604.41.yanxd

• Papers • Previous Articles     Next Articles

A Data Replica Replacement Algorithm Based on Value Model

YAN Xiao-dong1,2 , XU Hui-min1, XU Ya-jing1, LIOU Lian-xi1 ,CHEN Bao-feng1   

  1. 1. School of Telecommunications Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;2. School of Mathematics and Computer, Central University for Nationalities, Beijing 100081,China
  • Received:2005-05-12 Revised:1900-01-01 Online:2006-08-30 Published:2006-08-30
  • Contact: YAN Xiao-dong

Abstract:

Adapting to the high variation environment in data grid, a data replica replacement algorithm based on value model is proposed and the arithmetic to calculate replica value is introduced. The algorithm is used on data replica replacement. When there is not enough storage space during replication, the replica whose value is the least will be deleted. This algorithm can improve and maintain a high overall throughput of grid jobs that access files in a data grid. Experimental results show that the proposed algorithm can obtain better performance for grid task to access data replica.

Key words: value model, data grid, data replication, replica replacement

CLC Number: