An Efficient Access Forwarding Method Based On Caches On Storage Nodes

In this paper, we discuss access forwarding schemes for the replication that achieve balanced access load distribution for data replicas on multiple storage nodes. In parallel storage systems, it is significant to handle skew of accessrequest distribution. Although replication is commonly used to solve such problems, it decreases hit ratios of cache memories on each storage nodes. We first obtain a result that it uses cache memories efficiently to forward accesses that target at data in less demand with a simple experiment. We also propose a method that uses hit ratios of each cache to recognize the popularity of data with low costs. Results of experiments with the method show that it helps the replication use the limited cache space efficiently.