Youyou Lu

Associate Professor

email：luyouyou@tsinghua.edu.cn

URL：http://storage.cs.tsinghua.edu.cn/~lu

Education background

B.S., Nanjing University, 2009

Ph.D, Tsinghua University, 2015

Areas of Research Interests/ Research Projects

Computer System (Memory and Storage System, Operating System, Distributed System)；

Computer Architecture (Non-Volatile Memory, Software and Hardware Co-design)

Research Status

I am working on memory and storage systems research, and currently focus on the topics including flash storage system, in-memory storage and computing and programmable networked storage.

For the flash storage system research, I started the “re-architect and re-design the flash storage” research from 2010, and proposed the “software managed flash” (later known as Open-Channel SSD), which removes the FTL and exposes the flash memory hardware to system software for direct management [FAST’13, FAST’14, USENIX ATC’16]. This novel way of flash usage is now being adopted in industry.

For the memory system research, I studied the crash consistency problem of persistent memory [ICCD’14], which is one of the early works to abstract this problem, and proposed to reduce the persistence overhead in a software-based way [MSST’15, Best Paper RunnerUp], which is a new direction in reducing consistency overhead. I also designed and implemented a RDMA-based distributed NVM file system, Octopus. Octopus reduces the software latency by two orders, and effectively exploits the hardware benefits [USENIX ATC’17]. This design is attractive in big data analytics and AI systems that demand extremely low-latency of I/Os.

Honors And Awards

Excellent Postdoctoral Research Award of Tsinghua University（2017）

CCF Outstanding Doctoral Dissertation Award（2016）

Young Elite Scientists Sponsorship Program by CAST（2015）

Academic Achievement

[1] Siyang Li, Youyou Lu, Jiwu Shu, Tao Li, Yang Hu. LocoFS: A Loosely-Coupled Metadata Service for Distributed File Systems, accepted to the International Conference for High Performance Computing, Networking, Storage and Analysis (SC’17), November 12-17, 2017, Denver, CO

[2] Youyou Lu, Jiwu Shu, Youmin Chen, Tao Li. Octopus: an RDMA-enabled Distributed Persistent Memory File System, USENIX Annual Technical Conference (USENIX ATC'17), July 12-14, 2017, Santa Clara, CA

[3] Jiacheng Zhang, Jiwu Shu, Youyou Lu. ParaFS: A Log-Structured File System to Exploit the Internal Parallelism of Flash Devices, USENIX Annual Technical Conference (USENIX ATC'16), June 22-24, 2016, Denver, CO

[4] Jiaxin Ou, Jiwu Shu, Youyou Lu.A High Performance File System for Non-Volatile Main Memory, in Proceedings of the European Conference on Computer Systems (EuroSys'16), April 18-21, 2016, London, UK

[5] Youyou Lu, Jiwu Shu, Jia Guo, Peng Zhu. Supporting System Consistency with Differential Transactions in Flash-based SSDs, IEEE Transactions on Computers (TC), vol 65, issue 2, pp 627-639, Feb. 2016

[6] Youyou Lu, Jiwu Shu, Long Sun. Blurred Persistence: Efficient Transactions in Persistent Memory, ACM Transactions on Storage (TOS), vol 12, issue 1, Jan. 2016

[7] Youyou Lu, Jiwu Shu, Jia Guo, Shuai Li, Onur Mutlu. High-Performance and Lightweight Transaction Support in Flash-based SSDs, IEEE Transactions on Computers (TC), vol 64, issue 10, pp 2819-2832, Oct. 2015

[8] Youyou Lu, Jiwu Shu, Long Sun.Blurred Persistence in Transactional Persistent Memory, in Proceedings of the 31st International Conference on Massive Storage Systems and Technology (MSST'15), May 30 - June 5, 2015, Santa Clara, USA (Best Paper Runner-up)

[9] Youyou Lu, Jiwu Shu, Long Sun, Onur Mutlu.Loose-Ordering Consistency for Persistent Memory, in Proceedings of the 32nd IEEE International Conference on Computer Design (ICCD'14), October 19-22, 2014, Seoul, Korea

[10] Letian Yi, Jiwu Shu, Ying Zhao, Yingjin Qian, Youyou Lu, Weimin Zheng. Design and Implementation of an Asymmetric Block-based Parallel File System, IEEE Transactions on Computers (TC), vol. 63, no. 7, pp. 1723-1735, July 2014

[11] Youyou Lu, Jiwu Shu, Wei Wang,ReconFS: A Reconstructable File System on Flash Storage, in Proceedings of the 12th USENIX Conference on File and Storage Technologies (FAST'14), February 17-20, 2014, Santa Clara, USA

[12] Youyou Lu, Jiwu Shu, Weimin Zheng,Extending the Lifetime of Flash-based Storage through Reducing Write Amplification from File Systems,in Proceedings of the 11th USENIX Conference on File and Storage Technologies (FAST'13), February 12-15, 2013, San Jose, USA