Abstract
We have proposed a distributed storage system which dynamically makes storage tiers and optimizes location of data blocks autonomously. This aims to enhance the I/O performance of the storage system without remarkable network overhead. Our system dynamically organizes storage tiers considering device characteristics. And the data blocks will be placed in a suitable storage tier according to their access pattern. In this paper, we propose a method to select the destination storage node for migration using an access characteristic of a data block to be migrated. This method dynamically ranks the storage nodes, and autonomously configures storage tiers based on relative performance to the migration initiator. Simulation results show that our scheme can shorten the execution time of a program with file I/O by 80% at maximum, in comparison with the static migration without considering the access characteristics of the migration data.
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