Load-Aware Transmission Mechanism for NVMeoF Storage Networks

Qiao Xinghan; Xie Xuchao; Xiao Liquan

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Load-Aware Transmission Mechanism for NVMeoF Storage Networks

Qiao Xinghan 1,Xie Xuchao 2 *,Xiao Liquan 1

1.College of Computer,National University of Defense Technology,Changsha 410071;College of Computer,National University of Defense Technology,Changsha 410071;College of Computer,National University of Defense Technology,Changsha 410071

*Correspondence author

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Funding: National Natural Science Foundation of China（No.No.61802418）

Opened online:28 October 2021

Accepted by: none

Citation: Qiao Xinghan,Xie Xuchao,Xiao Liquan.Load-Aware Transmission Mechanism for NVMeoF Storage Networks[OL]. [28 October 2021] http://en.paper.edu.cn/en_releasepaper/content/4755658

NVMe over TCP is a key technology for building large-scale high-performance storage systems.It can realize NVMeoF (NVMe over Fabrics) storage network based on the existing data center network infrastructure and standard TCP/IP software protocol stack. This article designs and implements the Load-Aware NVMeoF message processing mechanism LANoT (Load-Aware NVMe over TCP). Firstly, the interrupt merging technology based on aggregated PDU is used to alleviate the interrupt storm problem and achieve high throughput. Secondly, matching the special message processing mechanism, which can effectively improve its key performance indicators for applications according to the I/O characteristics of different dedicated queues . This paper implements the LANoT prototype system in the Linux kernel. The performance test results show that compared to the NVMe over TCP implementation in the standard Linux kernel, LANoT can reduce CPU resource consumption by more than 50% and increase IOPS by more than twice.

Keywords:NVMe over Fabrics, NVMe over TCP, Storage Networks, Load-Aware

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