Levin Li
Distributed System Engineer at TaoBao Inc.
Beijing, China
Summary
👤
Senior🎓
Top SchoolLevin Li is a seasoned Distributed System Engineer with 16 years' experience, currently optimizing parallel and MPI-based machine learning workflows and maintaining large-scale MPI platforms at Taobao/Alibaba. He is a core developer of Sheepdog, a distributed storage system for QEMU, where his work on object list caching and recovery optimizations measurably improved list retrieval speed and reduced I/O during cluster recovery. Levin has also extended cluster resource managers (Torque) with job-level cgroup isolation and memory/cpu controls, and authored open-source IM projects including Hybrid and Openfetion. Comfortable in C/Linux/Vim/Git, he pairs deep systems engineering with a practical focus on performance and recoverability—often improving efficiency by rethinking data structures and cache behavior.
16 years of coding experience
M.E., Communication and Information System, M.E., Communication and Information System at Beijing University of Post and TelecommunicationsBS, Communication Engineering, BS, Communication Engineering at Ocean University of China
Stackoverflow
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Github Skills (6)
c1710
data-storage10
distributed-systems10
distributed-file-system10
c1110
performance-optimization9
Programming languages (5)
Github contributions (5)
sheepdog/sheepdog
Mar 2012 - Dec 2012
Distributed Storage System for QEMU
Role in this project:
Back-end Developer
Back-end DeveloperContributions:117 commits in 9 months
Contributions summary:Levin's contributions focused on implementing and optimizing the object list cache within the distributed storage system. They added a red-black tree-based object list cache and applied it to various modules, significantly improving the speed of retrieving object lists. Furthermore, the user optimized the cluster's recovery process to reduce I/O operations. The user also refactored the object cache to utilize a list for improved efficiency.
iscsiiscsi-targetdistributed-storageblockdeviceqemu-kvm
pai-eas/eas-python-sdk
May 2019 - Oct 2022
Contributions:28 commits, 15 PRs, 26 pushes in 3 years 5 months
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