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2023, Volume 24, Issue 5

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Frontiers of Information Technology & Electronic Engineering >> 2023, Volume 24, Issue 5 doi: 10.1631/FITEE.2200317

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

Affiliation(s): Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China; Xi'an Satellite Control Center, Xi'an 710043, China; Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing 100084, China; less

Received: 2022-07-25 Accepted: 2023-05-31 Available online: 2023-05-31
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Abstract

Compared with traditional solid-state drives (SSDs), open-channel SSDs (OCSSDs) expose their internal physical layout and provide a host-based (FTL) that allows host-side software to control the internal operations such as (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, 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.

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