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http://dx.doi.org/10.9708/jksci.2014.19.7.113

BLOCS: Block Correlation Aware Sequential Pattern Mining based Caching Algorithm for Hybrid Storages  

Lee, Seongjin (Department of Electronics and Computer Engineering, Hanyang University)
Won, Youjip (Department of Computer and Software, Hanyang University)
Publication Information
Journal of the Korea Society of Computer and Information / v.19, no.7, 2014 , pp. 113-130 More about this Journal
Abstract
In this paper, we propose BLOCS algorithm to find sequence of data that should be saved in cache device of hybrid storage system which uses SSD as a cache device. BLOCS algorithm which uses a sequence pattern mining scheme, creates a set of frequently requested sectors with respect to requested order of sectors. To compare the performance of the proposed scheme, we introduce Distance (DIST) based scheme, Request Frequency (FREQ) based scheme, and Frequency times Size (F-S) based scheme. We measure the hit ratio and I/O latency of different caching schemes using hybrid storage caching simulator. We acquired booting workload along with ten scenarios of launching applications and use the workloads as input to the cache simulator. After experiment with booting workload, we find that BLOCS scheme gives hit ratio of 61% which is about 15% higher than the least performing DIST scheme.
Keywords
Sequence pattern Mining; Caching Algorithm; Hybrid Storage; Cache Simulator;
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