A survey on design and application of open-channel solid-state drives

Junchao CHEN; Guangyan ZHANG; Junyu WEI

doi:10.1631/FITEE.2200317

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A survey on design and application of open-channel solid-state drives

Special Feature on Design and Application of New Storage Systems | Updated：2023-05-31

- A survey on design and application of open-channel solid-state drives
  Enhanced Publication
- 开放通道固态硬盘的设计与应用研究综述
- Frontiers of Information Technology & Electronic Engineering Vol. 24, Issue 5, Pages: 637-658(2023)
- Affiliations：
  
  1.Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China
  2.Xi'an Satellite Control Center, Xi'an 710043, China
  3.Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing 100084, China
- Author bio：
  
  ‡ Corresponding author
- Funds：
- DOI：10.1631/FITEE.2200317
  CLC： TP302
- Published：0 May 2023，
  
  Received：25 July 2022，
  
  Accepted：2022-11-16
- Accepted：
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JUNCHAO CHEN, GUANGYAN ZHANG, JUNYU WEI. A survey on design and application of open-channel solid-state drives. [J]. Frontiers of information technology & electronic engineering, 2023, 24(5): 637-658.
DOI：

JUNCHAO CHEN, GUANGYAN ZHANG, JUNYU WEI. A survey on design and application of open-channel solid-state drives. [J]. Frontiers of information technology & electronic engineering, 2023, 24(5): 637-658. DOI： 10.1631/FITEE.2200317.

摘要

与传统的固态硬盘（SSDs）相比，开放通道固态硬盘（OCSSDs）向外暴露了它们的内部物理布局，并提供了一个基于主机端的闪存转换层（FTL），使得它允许主机端软件根据具体场景和需求控制其内部操作，如垃圾回收（GC）和输入/输出（I/O）调度等。本文对近年来基于OCSSDs的研究工作进行了全面的调研，总结了它们如何利用OCSSDs的特性来实现高吞吐量、低访问延迟、长寿命、强性能隔离和高资源利用率等目标，并从接口定制、FTL协同设计、内部并行性挖掘、I/O调度和GC处理等五个方面对这些工作进行了深入的研究分析。我们讨论了目前研究工作的优势和不足，并发现几乎所有的这些研究方法都面临着性能有效性和管理复杂性之间的困境。本文旨在通过开展综述调研能为希望进入这一领域的研究人员提供关于OCSSDs的基础知识，并进一步激发他们在相关研究工作中的新想法。

Abstract

Compared with traditional solid-state drives (SSDs)

open-channel SSDs (OCSSDs) expose their internal physical layout and provide a host-based flash translation layer (FTL) that allows host-side software to control the internal operations such as garbage collection (GC) and input/output (I/O) scheduling. In this paper

we comprehensively survey research works built on OCSSDs in recent years. We show how they leverage the features of OCSSDs to achieve high throughput

low latency

long lifetime

strong performance isolation

and high resource utilization. We categorize these efforts into five groups based on their optimization methods: adaptive interface customizing

rich FTL co-designing

internal parallelism exploiting

rational I/O scheduling

and efficient GC processing. We discuss the strengths and weaknesses of these efforts and find that almost all these efforts face a dilemma between performance effectiveness and management complexity. We hope that this survey can provide fundamental knowledge to researchers who want to enter this field and further inspire new ideas for the development of OCSSDs.

关键词

领域专用存储闪存转换层垃圾回收内部并行性开放通道固态硬盘（OCSSDs）

Keywords

Domain-specific storageFlash translation layerGarbage collectionInternal parallelismOpen-channel solid-state drives (OCSSDs)

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