uFLIP-OC: Understanding Flash I/O Patterns on Open-Channel Solid State Drives

Ivan Luiz Picoli; Carla Ysabela Villegas Pasco; Björn Thór Jónsson; Luc Bouganim; Philippe Bonnet

doi:10.1145/3124680.3124741

uFLIP-OC: Understanding Flash I/O Patterns on Open-Channel Solid State Drives

Ivan Luiz Picoli, Carla Ysabela Villegas Pasco, Björn Thór Jónsson, Luc Bouganim, Philippe Bonnet

Research output: Conference Article in Proceeding or Book/Report chapter › Article in proceedings › Research › peer-review

Abstract

Solid-State Drives (SSDs) have gained acceptance by providing the same block device abstraction as magnetic hard drives, at the cost of suboptimal resource utilisation and unpredictable performance. Recently, Open-Channel SSDs have emerged as a means to obtain predictably high performance, based on a clean break from the block device abstraction. Open-channel SSDs embed a minimal flash translation layer (FTL) and expose their internals to the host. The Linux open-channel SSD subsystem, LightNVM, lets kernel modules as well as user-space applications control data placement and I/O scheduling. This way, it is the host that is responsible for SSD management. But what kind of performance model should the host rely on to guide the way it manages data placement and I/O scheduling? For addressing this question we have defined uFLIP-OC, a benchmark designed to identify the I/O patterns that are best suited for a given open-channel SSD. Our experiments on a DragonFire Card (DFC) SSD, equipped with the OX controller, illustrate the performance impact of media characteristics and parallelism. We discuss how uFLIP-OC can be used to guide the design of host-based data systems on open-channel SSDs.

Original language	English
Title of host publication	APSys '17 Proceedings of the 8th Asia-Pacific Workshop on Systems
Number of pages	7
Place of Publication	Mumbai, India
Publisher	Association for Computing Machinery
Publication date	Sep 2017
Pages	20:1-20:7
Article number	20
ISBN (Print)	978-1-4503-5197-3
DOIs	https://doi.org/10.1145/3124680.3124741
Publication status	Published - Sep 2017

Keywords

Open-channel SSDs
NAND Flash
Benchmarking
uFLIP-OC

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apsys-2017-uflip-ocAccepted author manuscript, 1.75 MB

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Cite this

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title = "uFLIP-OC: Understanding Flash I/O Patterns on Open-Channel Solid State Drives",

abstract = "Solid-State Drives (SSDs) have gained acceptance by providing the same block device abstraction as magnetic hard drives, at the cost of suboptimal resource utilisation and unpredictable performance. Recently, Open-Channel SSDs have emerged as a means to obtain predictably high performance, based on a clean break from the block device abstraction. Open-channel SSDs embed a minimal flash translation layer (FTL) and expose their internals to the host. The Linux open-channel SSD subsystem, LightNVM, lets kernel modules as well as user-space applications control data placement and I/O scheduling. This way, it is the host that is responsible for SSD management. But what kind of performance model should the host rely on to guide the way it manages data placement and I/O scheduling? For addressing this question we have defined uFLIP-OC, a benchmark designed to identify the I/O patterns that are best suited for a given open-channel SSD. Our experiments on a DragonFire Card (DFC) SSD, equipped with the OX controller, illustrate the performance impact of media characteristics and parallelism. We discuss how uFLIP-OC can be used to guide the design of host-based data systems on open-channel SSDs.",

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uFLIP-OC: Understanding Flash I/O Patterns on Open-Channel Solid State Drives. / Picoli, Ivan Luiz; Villegas Pasco, Carla Ysabela; Jónsson, Björn Thór et al.

APSys '17 Proceedings of the 8th Asia-Pacific Workshop on Systems. Mumbai, India : Association for Computing Machinery, 2017. p. 20:1-20:7 20.

Research output: Conference Article in Proceeding or Book/Report chapter › Article in proceedings › Research › peer-review

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T1 - uFLIP-OC: Understanding Flash I/O Patterns on Open-Channel Solid State Drives

AU - Picoli, Ivan Luiz

AU - Villegas Pasco, Carla Ysabela

AU - Jónsson, Björn Thór

AU - Bouganim, Luc

AU - Bonnet, Philippe

PY - 2017/9

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N2 - Solid-State Drives (SSDs) have gained acceptance by providing the same block device abstraction as magnetic hard drives, at the cost of suboptimal resource utilisation and unpredictable performance. Recently, Open-Channel SSDs have emerged as a means to obtain predictably high performance, based on a clean break from the block device abstraction. Open-channel SSDs embed a minimal flash translation layer (FTL) and expose their internals to the host. The Linux open-channel SSD subsystem, LightNVM, lets kernel modules as well as user-space applications control data placement and I/O scheduling. This way, it is the host that is responsible for SSD management. But what kind of performance model should the host rely on to guide the way it manages data placement and I/O scheduling? For addressing this question we have defined uFLIP-OC, a benchmark designed to identify the I/O patterns that are best suited for a given open-channel SSD. Our experiments on a DragonFire Card (DFC) SSD, equipped with the OX controller, illustrate the performance impact of media characteristics and parallelism. We discuss how uFLIP-OC can be used to guide the design of host-based data systems on open-channel SSDs.

AB - Solid-State Drives (SSDs) have gained acceptance by providing the same block device abstraction as magnetic hard drives, at the cost of suboptimal resource utilisation and unpredictable performance. Recently, Open-Channel SSDs have emerged as a means to obtain predictably high performance, based on a clean break from the block device abstraction. Open-channel SSDs embed a minimal flash translation layer (FTL) and expose their internals to the host. The Linux open-channel SSD subsystem, LightNVM, lets kernel modules as well as user-space applications control data placement and I/O scheduling. This way, it is the host that is responsible for SSD management. But what kind of performance model should the host rely on to guide the way it manages data placement and I/O scheduling? For addressing this question we have defined uFLIP-OC, a benchmark designed to identify the I/O patterns that are best suited for a given open-channel SSD. Our experiments on a DragonFire Card (DFC) SSD, equipped with the OX controller, illustrate the performance impact of media characteristics and parallelism. We discuss how uFLIP-OC can be used to guide the design of host-based data systems on open-channel SSDs.

KW - Open-channel SSDs

KW - NAND Flash

KW - Benchmarking

KW - uFLIP-OC

U2 - 10.1145/3124680.3124741

DO - 10.1145/3124680.3124741

M3 - Article in proceedings

SN - 978-1-4503-5197-3

SP - 20:1-20:7

BT - APSys '17 Proceedings of the 8th Asia-Pacific Workshop on Systems

PB - Association for Computing Machinery

CY - Mumbai, India

ER -

uFLIP-OC: Understanding Flash I/O Patterns on Open-Channel Solid State Drives

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Keywords

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