A more concise pdf version can be viewed here.

Education

Shanghai Jiao Tong University

B. Eng in Computer Science and Engineering
September 2018 — June 2022 (Expected)
Shanghai, China

• GPA 93.97/100 (or 4.07/4.3), Rank 1/154, National Scholarship 2019 (Top 0.2% national-wide)
• A+ Courses: Operating Systems, Computer Architecture, Computer Networks, and 28 others

(Click to Expand)

• Full-score (100/100) courses
  • CS154: C++ Programming Language (Fall 2018)
  • CS149: Data Structure (Spring 2019)
  • MS125: Principle and Practice of Computer Algorithms (Summer 2019)
  • CS241: Principles and Practice of Problem Solving (Fall 2019) [final project + presentation]
  • CS307: Operating System (Spring 2020)
  • CS356: Operating System Projects (Spring 2020) [final project + presentation]
  • CS145: Computer Architecture Experiments (Spring 2020) [final project + report]
  • … and 2 more
• Other A+ courses
  • (95/100) CS359: Computer Architecture (Spring 2020)
  • (96/100) EI209: Computer Organization (Spring 2020)
  • (96/100) CS339: Computer Networks (Fall 2020)
  • (95/100) CS236: Cloud Computing (Fall 2020)
  • (99/100) CS410: Artificial Intelligence (Fall 2020)
  • (99/100) CS467: Theory of Computation (Fall 2020)
  • … and 16 more

No.2 High School Attached to East China Normal University

High School
September 2015 — June 2018
Shanghai, China

Work Experience

Singularity Data, Inc.

Database System R&D Intern
September 2021 — Now
Shanghai, China

• Mainly work on design and implementation of the streaming engine from scratch in Singularity’s database product, which is aimed to provide real-time materialized view in the database system.

TerarkDB Team @ Bytedance, Ltd.

Storage System R&D Intern
June 2021 — August 2021
Beijing, China

I worked on TerarkDB for Zoned Namespace SSDs, contributed to ZenFS, and co-designed an unnamed file system for the next-generation key-value storage engine.

• Implemented Zone-Aware Garbage Collection in TerarkDB for Zoned Namespace SSDs, which reduces 3-4x of space amplification caused by interleaving write lifetime.
• Added observability facilities to ZenFS (by Western Digital) to analyze bottlenecks and implemented a WAL-Aware Zone Allocator, which reduces tail latency from 1000 to 10 msec.

TiKV Storage Team @ PingCAP, Inc.

Storage System R&D Intern
August 2020 — January 2021
Shanghai, China

I built a key-value storage engine AgateDB.

• Built LSM-based storage engine AgateDB from ground-up. Inspired by WiscKey paper, AgateDB separates large values from the LSM tree into a value log. This design leads to a 10x write speedup on large values in some cases, compared with the current storage engine used by TiKV.

Open-Source Contributions

TiKV Community

May 2020 — Now

TiKV is a distributed key-value storage engine behind the MySQL-compatible HTAP database TiDB. I worked on several components of TiKV.

• TiKV Maintainer, Co-leader of Coprocessor SIG
  • Migrate the TiKV Coprocessor framework to use TiDB Chunk format (similar to Apache Arrow) during the computation process, as a mentee in Community Bridge mentorship. This is so-called Full Chunk-based Computing project. (May 2020 — July 2020)
    [RFC] [Tracking Issue] [Blog Post] [Presentation]
  • Review patches and help grow the community.
• Mentor of TiKV LFX Mentorship
  • Mentored on Enum/Set support in TiKV project. (September 2020 — December 2020)
    [RFC] [Tracking Issue] [Blog Post]
  • Co-mentored on Coprocessor Plugin project. (March 2021 — May 2021)
    [RFC] [Tracking Issue] [Blog Post]
• Develop AgateDB after my internship in PingCAP.

Shanghai Jiao Tong University Linux User Group

May 2019 — Now

SJTUG, or Shanghai Jiao Tong University Linux User Group, is an open-source community as well as a Linux user group in SJTU. I maintains the SJTUG mirror service and the SJTUThesis LaTeX template.

• Maintainer of SJTUG mirror service (May 2019 — Now)
  • SJTUG mirror serves 2 million requests and 3TB of data from 70k users a day.
  • Build an open-source mirror infrastructure.
  • Set up Siyuan mirror server.
  • Build mirror-intel, which enables us to host the first Flathub mirror in China.
  • Leverage object storage service to store files with mirror-clone.
• Maintainer of SJTU TeX Templates (May 2021 — Now)
  • Maintainer of SJTUThesis, the de-facto LaTeX thesis template used by SJTU students.
  • Incubate SJTUBeamer template.

Other Experience

TA in PPCA Ray-Tracing Project

July 2020 — August 2020

Principle and Practice of Computer Algorithms (PPCA) is a project-oriented course for first-year undergraduates, where they use what they have learned to build a toy application in one month. I designed a lab based on Ray Tracing In One Weekend and mentored 13 students to make a ray-tracer with the Rust programming language.

You may take a look at Student Project Showcase and Project Template and Tutorials.

Talks

• Full Chunk-based Computing in TiKV Coprocessor (August 2020)
  [Video on YouTube] [Slides]
• Paper Reading on “Lethe: A Tunable Delete-Aware LSM Engine” (October 2020)
  [Video on Bilibili] [Original Paper] [Slides]
• Paper Reading on “FPTree: A Hybrid SCM-DRAM Persistent and Concurrent B-Tree for Storage Class Memory” (May 2021)
  [Video on Bilibili] [Original Paper] [Slides]
• Sharing of “The SJTUG Mirror Service” (July 2021, at Tunight)
  [Slides]

Projects

See Build things for fun, for all.

Skills

Programming Languages

Rust (proficient), C++ (novice), Golang (able to read), Python and Node.js

Tech Skills

• Local Storage Systems (RocksDB, TitanDB, TerarkDB, BadgerDB)
• Linux I/O and File Systems (io_uring, ZenFS, Ext4, XFS)
• Database Systems (TiDB)
• Stream-Processing Systems (Flink)

Honors and Awards

National Scholarship (Ministry of Education of P.R. China), 2019

Fun fact: I was also qualified for National Scholarship in 2020, but I gave that chance to my classmates. It’s boring to get the same award every year.

Updated at Sep 30, 2021