Abstract
For the system providing server SSD (Solid State Drive) cache and volume tiering functions, it is difficult to determine which data to be placed into SSD tier on the basis of the number of I/O (Input/Output). In this paper, we propose a volume tiering method cooperating with the server SSD cache, which counts the number of I/O on the server and allocates storage SSD to read-intensive areas. We conduct an I/O simulation experiment using I/O log traced on the real environment to validate the proposed method. We show that the proposed method reduces I/O average response time by up to 10% compared to the existing method through the I/O simulation experiment.
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