IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
Hexa-SSD: Overcoming capacitance constraints in SSDs
Sanghyun NamSeungmin ShinEunji Lee
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2022 Volume 19 Issue 21 Pages 20220416

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Abstract

This paper presents Hexa-SSD, a novel SSD-internal DRAM management scheme that allows the SSD capacity to scale beyond the slow growth of capacitors. Hexa-SSD judiciously manages the dirty memory footprint within the SSD-internal buffer by using a low-overhead data reordering scheme on the deep queues available in today’s storage interfaces. In doing so, our design guarantees crash consistency while using a fraction of the capacitors compared to the state-of-the-art designs. We implement our design in FEMU and demonstrate that Hexa-SSD delivers up to 1.4× higher IOPS and up to 49% less write amplification compared to the existing scheme under power constraints.

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© 2022 by The Institute of Electronics, Information and Communication Engineers
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