Don't make cache too complex: A simple probability-based cache management scheme for SSDs SCIE SCOPUS

Cited 1 time in WEB OF SCIENCE Cited 2 time in Scopus
Title
Don't make cache too complex: A simple probability-based cache management scheme for SSDs
Author(s)
Baek, Seungjae; Cho, Sangyeun; Choi, Jongmoo
KIOST Author(s)
Baek, Seung Jae(백승재)
Publication Year
2017-03-30
Abstract
Solid-state drives (SSDs) have recently become a common storage component in computer systems, and they are fueled by continued bit cost reductions achieved with smaller feature sizes and multiple-level cell technologies. However, as the flash memory stores more bits per cell, the performance and reliability of the flash memory degrade substantially. To solve this problem, a fast non-volatile memory (NVM-)based cache has been employed within SSDs to reduce the long latency required to write data. Absorbing small writes in a fast NVM cache can also reduce the number of flash memory erase operations. To maximize the benefits of an NVM cache, it is important to increase the NVM cache utilization. In this paper, we propose and study ProCache, a simple NVM cache management scheme, that makes cache-entrance decisions based on random probability testing. Our scheme is motivated by the observation that frequently written hot data will eventually enter the cache with a high probability, and that infrequently accessed cold data will not enter the cache easily. Owing to its simplicity, Pro Cache is easy to implement at a substantially smaller cost than similar previously studied techniques. We evaluate ProCache and conclude that it achieves comparable performance compared to a more complex reference counter-based cache-management scheme.
ISSN
1932-6203
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1269
DOI
10.1371/journal.pone.0174375
Bibliographic Citation
PLOS ONE, v.12, no.3, 2017
Publisher
PUBLIC LIBRARY SCIENCE
Subject
FLASH MEMORY; SYSTEMS
Type
Article
Language
English
Document Type
Article
Publisher
PUBLIC LIBRARY SCIENCE
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