Abstract
SUMMARY We evaluated the storage I/O response time with the volume tiering method and the SSD cache method on tiered storage having SSD and HDD. The simulation results show that the volume tiering method improves the storage performance with low I/O locality workload and small SSD capacity. The SSD cache method is effective with read-intensive and high I/O locality workloads. Utilizing both methods simultaneously reduces the storage I/O response time by up to 20% with write-intensive workloads and large SSD capacity compared to using the volume tiering method or the SSD cache method separately.
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