Enhanced Replication Strategy using Proportional Replication
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Abstract
Replication is used to improve the performance of data access in terms of increased availability, load balancing and fault tolerance. There are three aspects which need to be considered are target replica, frequency of replica and location of replica. As the number of replica increase, data consistency & maintenance overhead are major challenges in replication of data. To ensure data availability and consistency in order to deal with fast updates, optimal data replication can be used. To determine optimal number of replica during initial placement phase, uniform and proportional replica distribution strategy can be used. Proportional replication strategy replicates items proportional to their popularity but harder to find less popular items. To resolve this problem the optimised distribution strategy can be implemented which proactively replicate the data as per user request. By using analytical model, this paper shows increased availability, improved performance and reduced system overhead in the form of number of hits to access data.
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Keywords: data replication; replica distribution strategy; optimal number of replica; proportional replication
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