@inproceedings{4b5d8c283c58424cb433e3bee7c50a08,
title = "Crash Consistent Non-Volatile Memory Express",
abstract = "This paper presents crash consistent Non-Volatile Memory Express (ccNVMe), a novel extension of the NVMe that defines how host software communicates with the non-volatile memory (e.g., solid-state drive) across a PCI Express bus with both crash consistency and performance efficiency. Existing storage systems pay a huge tax on crash consistency, and thus can not fully exploit the multi-queue parallelism and low latency of the NVMe interface. ccNVMe alleviates this major bottleneck by coupling the crash consistency to the data dissemination. This new idea allows the storage system to achieve crash consistency by taking the free rides of the data dissemination mechanism of NVMe, using only two lightweight memory-mapped I/Os (MMIO), unlike traditional systems that use complex update protocol and heavyweight block I/Os. ccNVMe introduces transaction-aware MMIO and doorbell to reduce the PCIe traffic as well as to provide atomicity. We present how to build a high-performance and crash-consistent file system namely MQFS atop ccNVMe. We experimentally show that MQFS increases the IOPS of RocksDB by 36\% and 28\% compared to a state-of-the-art file system and Ext4 without journaling, respectively.",
keywords = "NVMe, SSD, crash consistency, file system, storage protocol",
author = "Xiaojian Liao and Youyou Lu and Zhe Yang and Jiwu Shu",
note = "Publisher Copyright: {\textcopyright} 2021 ACM.; 28th ACM Symposium on Operating Systems Principles, SOSP 2021 ; Conference date: 26-10-2021 Through 29-10-2021",
year = "2021",
month = oct,
day = "26",
doi = "10.1145/3477132.3483592",
language = "英语",
series = "SOSP 2021 - Proceedings of the 28th ACM Symposium on Operating Systems Principles",
publisher = "Association for Computing Machinery, Inc",
pages = "132--146",
booktitle = "SOSP 2021 - Proceedings of the 28th ACM Symposium on Operating Systems Principles",
}