Software Engineer

Yin Li Email : *********@*****.***

www.linkedin.com/in/yinliRPI Mobile : +1-518-***-****

Education

Rensselaer Polytechnic Institute (RPI) Troy, NY

Ph.D. in Electrical Engineering Aug. 2014 { Present

- GPA: 3.93/4.00, Advisor: Prof. Tong Zhang

- Research Area: Storage Systems, File Systems Design, In-memory key value stores(IMKV), Data Recovery

Beihang University (BUAA) Beijing, China

M.E. in Information and Communication Engineering Sep. 2009 { Jan. 2012

- GPA: 3.82/4.00

- Research Area: Simulation and Design of Communication Systems

Beijing University of Posts and Telecommunications (BUPT) Beijing, China B.E. in Communication Engineering Sep. 2005 { July. 2009

- Major GPA: 3.87/4.00 (89/100), Overall GPA: 3.78/4.00 (88/100) Work Experience

National Key Lab of Applied Optics Changchun, China Embedded System Software Engineer Apr. 2012 { July. 2014

- Built Matlab/Simulink simulation models for a self-adaptive double-loop fuzzy-PID controller.

- Developed both the hardware (PCB) and software of an FPGA-based brushless DC motor (BLDC) controller which using CAN bus for communication.

Research Projects

Software-De ned Data Center Hard Disk Drives (HDD) C/Bash/MySQL Collaborated with Google Corporation July 2017 { Present

- Realized a lesystem which could relax HDD raw bit error rate by 3 4 orders of magnitude meanwhile induces < 9% of redundancy overhead and < 1% throughput degradation for ne-grained data update/read workloads.

- Redesign error correction coding (ECC) modules inside an HDD controller which could work cohesively with the lesystem to further reduce tail latency overhead to < 10%.

- Measured IOPS of di erent workloads based on the read/write patterns collected from Linux kernel.

A Joint Distributed & Local Erasure Coding Algorithm C/Bash/Assembly Language A Research Project on Data Storage Recovery Nov. 2016 { June 2017

- Designed an algorithm to increase encoding throughput by leveraging the characteristics of erasure coding when data storage systems are protected by both distributed and local erasure coding.

- Developed the proposed encoder/decoder on a general-purpose PC with the Galois Field (GF) calculation acceleration supported by Intel SSE 4.2 instruction sets, encoding throughput increases by > 25%.

Filesystem-level Transparent Local Erasure Coding to Facilitate Scaling C/C++/Bash Collaborated with Western Digital Corporation Oct. 2016 { Oct. 2017

- Validated the feasibility and e ectiveness to apply erasure coding into local lesystems to increase the reliability of data storage system for the rst time in the world.

- Designed a lesystem to mitigate soft sector read failures, for coarse-grained write/read workloads it can reduce the 99-percentile tail latency by > 65% with <2% coding redundancy even the HDD decoding failure rate is 10 3.

- Developed techniques to address issues of unaligned HDD write and ne-grained data update.

Software-based Error Correction for In-Memory Key-Value Stores (IMKV) C/C++ Funded by National Science Foundation Oct. 2014 { Sep. 2015

- Realized fast software-based encoding/decoding engines for BCH code. The encoding throughput is 4 compared with the baseline case.

- Proposed a solution with very strong memory error correction at very small coding redundancy for IMKV.

- Embedded software BCH into Memcached and RAMCloud and measured the performance of workloads.

Analysis of Co-site Interference between Radio Communications Matlab/Simulink A Research Project on Communication System Feb. 2011 { Jan. 2012

- Analyzed the nonlinear characteristics of ampli ers e ect on co-site communication interference, then built a simulation model of ampli ers.

- Proposed a method using SINAD, BER or EVM as a criterion to predict the co-site interference of communication systems.

Positioning System Based on Radio Frequency Identi cation (RFID) C/C++ A Research Project on Communication System June 2010 { Jan. 2011

- Designed RFID cards and readers with RF chip RF2401, and using RS-485 to send and receive messages.

- Applied ZigBee technique to improve the reliability and security of the RFID system. Internship Experience

Intern of Embedded System Engineer at Hollysys Automation Technologies Ltd. Sep. 2009 { May. 2010

- Developed a receiver module which generates a frequency-shift keying (FSK) radio frequency (RF) signal to communicate with the host.

Research Assistant and Teaching Assistant at RPI Aug. 2014 { Present Selected Publications

Y. Li, H. Wang, X. Zhang, N. Zheng, S. Dahandeh, and T. Zhang, Facilitating Magnetic Recording Technolo-

-gy Scaling for Data Center Hard Disk Drives through Filesystem-level Transparent Local Erasure Coding, USENIX Conference on File and Storage Technologies (FAST’17), pp. 135-148, Feb. 2017.

Y. Li, H. Wang, X. Zhao, H. Sun, and T. Zhang, Applying Software-based Memory Error Correction for In-

-Memory Key-Value Store: Case Studies on Memcached and RAMCloud, International Symposium on Memo-

-ry Systems (MEMSYS’16), Oct. 2016.

H. Wang, Y. Li, X. Zhang, X. Zhao, H. Sun, and T. Zhang, On the Use of DRAM with Unrepaired Weak Cells in Computing Systems, International Symposium on Memory Systems (MEMSYS’16), Oct. 2016

Y. Li, Z. Zheng, J. Liu, and Y. Liu, Prediction and analysis of co-site interference between radio communicati-

-ons based on behavioral modeling, Electronic Measurement Technology, vol.34, pp. 122-126, 2011.

R. Guo, Y. Li, Y. Wang, and J. Liu, Design of ZigBee-based RFID system in equipment management, Measu-

-rement & Control Technology, vol. 30, pp. 89-93, 2011.

R. Guo, Y. Li, Y. Wang, and J. Liu, Design of BTM receiver module in Intermittent Balise of CTCS, Electro-

-nic Measurement Technology, vol. 33, pp.19-22, 2010. Programming Skills

Programming : C, C++, Matlab, Bash, MySQL, Java, VHDL/Verilog.

Skills : Distributed Systems, Erasure Coding/RAID, BCH, Ex2/Ext4, Hadoop, HiBench, Memcached, HDD/Flash Storage, PCB Design.

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