Publisher : The Institute of Electronics Engineers of Korea
DOI : 10.5573/JSTS.2015.15.5.539
Title & Authors
Offline Deduplication for Solid State Disk Using a Lightweight Hash Algorithm Park, Eunsoo; Shin, Dongkun;
Deduplication technique can expand the lifespan and capacity of flash memory-based storage devices by eliminating duplicated write operations. The deduplication techniques can be classified into two approaches, i.e., online and offline approaches. We propose an offline deduplication technique that uses a lightweight hash algorithm, whereas the previous offline technique uses a high-cost hash algorithm. Therefore, the memory space for caching hash values can be reduced, and more pages can be examined for deduplication during short idle intervals. As a result, it can provide shorter write latencies compared to the online approach, and can show low garbage collection costs compared to the previous offline deduplication technique.
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