Abstract
To ensure better I/O performance of NAND-based SSD storage, a DRAM cache is commonly equipped inside SSDs to absorb overwrites or writes performed to underlying SSD cells. This paper presents a simple, effective cache management method based on clean first least recently used (CFLRU) for SSDs, by also taking the factor of spatial locality into account. That is, we introduce a novel data management approach to separate hot and cold buffered data in the SSD cache by considering both factors of temporal and spatial locality, when accessing or inserting a piece of write data in the SSD cache. As a result, the hot buffered data and their spatially adjacent buffered data can be preferentially kept in the cache and other cold data will be evicted first. Simulation tests on several realistic disk traces show that our proposal improves cache hits by up to 4.5%, and then cuts down I/O response time by up to 9.4%, in contrast to the commonly used CFLRU scheme.
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Lin, H., Li, J., Sha, Z., Cai, Z., Liao, J., Shi, Y. (2022). A Novel CFLRU-Based Cache Management Approach for NAND-Based SSDs. In: Cérin, C., Qian, D., Gaudiot, JL., Tan, G., Zuckerman, S. (eds) Network and Parallel Computing. NPC 2021. Lecture Notes in Computer Science(), vol 13152. Springer, Cham. https://doi.org/10.1007/978-3-030-93571-9_17
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DOI: https://doi.org/10.1007/978-3-030-93571-9_17
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