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Enhanced Fast Spread Replication strategy for Data Grid
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DOI：10.1016/j.jnca.2010.12.006.png)
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Abstract
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Data replication is used in Data Grid to enhance data availability and fault tolerance. However, replication should be used wisely because the storage size of each node reside on the Data Grid is limited. Thus, the node must accommodate only the important replicas. In this paper, a dynamic replication strategy that takes into account the number and frequency of requests, the size of the replica, and the last time the replica was requested is proposed. This strategy is an enhanced version of Fast Spread replication strategy. The simulation results show that the new proposed strategy attained better performance than Fast Spread with Least Recently Used (LRU) and Fast Spread with Least Frequently Used (LFU) in terms of total response time and total bandwidth consumption. (C) 2010 Elsevier Ltd. All rights reserved.
Keywords:
Data Grid
Replication strategy
Fast Spread
Size
Number of requests
Frequency of requests
Last request time
Simulation
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