LightNVM: The Linux Open-Channel SSD Subsystem

Matias Bjørling, Javier Gonzalez, Philippe Bonnet

Publikation: Konference artikel i Proceeding eller bog/rapport kapitelKonferencebidrag i proceedingsForskningpeer review


As Solid-State Drives (SSDs) become commonplace in data centers and storage arrays, there is a growing demand for predictable latency. Traditional SSDs, serving block I/Os, fail to meet this demand. They offer a high-level of abstraction at the cost of unpredictable performance and suboptimal resource utilization. We propose that SSD management trade-offs should be handled through Open-Channel SSDs, a new class of SSDs, that give hosts control over their internals. We present our experience building LightNVM, the Linux Open-Channel SSD subsystem. We introduce a new Physical Page Ad- dress I/O interface that exposes SSD parallelism and storage media characteristics. LightNVM integrates into traditional storage stacks, while also enabling storage engines to take advantage of the new I/O interface. Our experimental results demonstrate that LightNVM has modest host overhead, that it can be tuned to limit read latency variability and that it can be customized to achieve predictable I/O latencies.
Titel15th USENIX Conference on File and Storage Technologies, FAST 2017, Santa Clara, CA, USA, February 27 - March 2, 2017
Antal sider16
ForlagUSENIX - The Advanced Computing Systems Association
ISBN (Elektronisk)978-1-931971-36-2
StatusUdgivet - 2017
BegivenhedUsenix Conference on File and Storage Technologies - Santa Clara, USA
Varighed: 27 feb. 20173 mar. 2017
Konferencens nummer: 15


KonferenceUsenix Conference on File and Storage Technologies
BySanta Clara


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