FlashNet
Autor: | Ioannis Koltsidas, Thomas R. Gross, Patrick Stuedi, Bernard Metzler, Jonas Pfefferle, Nikolas Ioannou, Animesh Trivedi, Kornilios Kourtis |
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Rok vydání: | 2018 |
Předmět: |
010302 applied physics
File system Remote direct memory access Computer performance Computer science 020206 networking & telecommunications IOPS 02 engineering and technology computer.software_genre 01 natural sciences Porting Protocol stack Hardware and Architecture Asynchronous communication 020204 information systems 0103 physical sciences Distributed data store 0202 electrical engineering electronic engineering information engineering Operating system computer Flash file system |
Zdroj: | SYSTOR |
ISSN: | 1553-3093 1553-3077 |
Popis: | During the past decade, network and storage devices have undergone rapid performance improvements, delivering ultra-low latency and several Gbps of bandwidth. Nevertheless, current network and storage stacks fail to deliver this hardware performance to the applications, often due to the loss of I/O efficiency from stalled CPU performance. While many efforts attempt to address this issue solely on either the network or the storage stack, achieving high-performance for networked-storage applications requires a holistic approach that considers both. In this article, we present FlashNet, a software I/O stack that unifies high-performance network properties with flash storage access and management. FlashNet builds on RDMA principles and abstractions to provide a direct, asynchronous, end-to-end data path between a client and remote flash storage. The key insight behind FlashNet is to co-design the stack’s components (an RDMA controller, a flash controller, and a file system) to enable cross-stack optimizations and maximize I/O efficiency. In micro-benchmarks, FlashNet improves 4kB network I/O operations per second (IOPS by 38.6% to 1.22M, decreases access latency by 43.5% to 50.4μs, and prolongs the flash lifetime by 1.6-5.9× for writes. We illustrate the capabilities of FlashNet by building a Key-Value store and porting a distributed data store that uses RDMA on it. The use of FlashNet’s RDMA API improves the performance of KV store by 2× and requires minimum changes for the ported data store to access remote flash devices. |
Databáze: | OpenAIRE |
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