美国东北大学计算机系糜宁芳副教授（我校讲座教授）学术报道

2018年4月18日下午3点，应计算机学院邀请，Ningfang Mi(我院讲座教授) ，an Associate Professor in Department of Electrical and Computer Engineering (ECE) at Northeastern University在仙林校区明理楼109报告厅做了题为《All Flash-based Storage Management in Cloud Computing Datacenter Infrastructures》的学术报告。报告会由计算机学院吉根林教授主持，我校部分教师和研究生聆听了整场报告。

    Ningfang Mi is an Associate Professor in Department of Electrical and Computer Engineering (ECE) at Northeastern University since 2009. Dr. Mi graduated with a B.S. in Computer Science from Nanjing University, China in 2000 and a M.S. in Computer Science from the University of Texas at Dallas in 2004. She received her Ph.D in Computer Science from the College of William and Mary in 2009.  Her research interests include cloud computing, big data processing, resource management, capacity planning, MapReduce/Hadoop scheduling, performance evaluation, simulation and virtualization. Dr. Mi was a recipient of the 2015 National Science Foundation (NSF) CAREER Award, the 2014 Air Force’s Young Investigator Research (YIP) Award and the 2010 IBM Faculty Award. She is the director of the Northeastern University Computer Systems Research Laboratory (NUCSRL) at Northeastern University.

Since 2017, more and more datacenters have started to replace traditional SATA and SAS SSDs with NVMe SSDs due to NVMe’s outstanding performance. However, for historical reasons, current popular deployments of NVMe in VM-hypervisor-based platforms have numbers of intermediate queues along the I/O stack. As a result, synchronization locks in these queues, cross-VM interference induces I/O latency, and most importantly, up-to-64K-queue capability of NVMe SSDs cannot be fully utilized, bottleneck performance. In this talk, we presented a new hybrid framework of NVMe-based storage system, called “H-NVMe”, which provides two VM I/O stack deployment modes “Parallel Queue Mode” and “Direct Access Mode”. We show that this H-NVMe framework can significant improve throughputs and bandwidths compared to the original inbox NVMe solution.

报告会后，糜宁芳副教授与现场的老师同学们进行了热烈的交流，并耐心详细地解答了听众的问题。此次报告拓展了大家的视野，也为老师同学们的研究思路提供了很多启示，大家收获颇丰。