Yao 岳峣
Chief Executive Officer at Pelikan Foundation
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolYao 岳峣 is a CEO and former Principal Software Engineer with 15 years of experience designing and optimizing large-scale distributed systems, caching layers, and infrastructure analytics from San Francisco. He founded IOP Systems to commercialize SystemsLab, an automated performance-assessment platform that turns repeated tests and telemetry into actionable insights for operators and decision-makers. At Twitter he led a small research-and-development team practicing software-hardware co-design, tracing and profiling in production, and authored Pelikan, a high-performance modular caching framework used for large deployments. His open-source work on Twitter’s twemcache and pelikan projects demonstrates deep expertise in memory management, slab LRU eviction, and efficient memcached command processing. Trained in physics and math at Tsinghua and a PhD student in computer science at Cornell, he blends rigorous analytical thinking with pragmatic engineering and uncommon hands-on involvement in both code and product.
15 years of coding experience
13 years of employment as a software developer
PhD student Computer Science, PhD student Computer Science at Cornell UniversityBS Fundamental Sciences (Physics & Mathematics), BS Fundamental Sciences (Physics & Mathematics) at Tsinghua University
English, Chinese, wu chinese
Stackoverflow
76reputation
1kreached
1answer
0questions
Github Skills (13)
c1710
algorithm10
memory-management10
algorithms10
caching10
c1110
back-end-development10
performance-optimization9
metric9
unit-testing9
git7
asp-net-mvc6
redis6
Programming languages (10)
Github contributions (5)
twitter/twemcache
Jul 2012 - Sep 2017
Twemcache is the Twitter Memcached
Role in this project:
Back-end Developer
Back-end DeveloperContributions:25 commits, 2 PRs, 5 pushes in 5 years 3 months
Contributions summary:Yao's primary contribution revolves around implementing and refining features related to slab allocation and management within the Twemcache codebase. They introduced and tested a slab Least Recently Used (LRU) eviction algorithm, optimizing memory utilization. Further work involved code cleanups, unit testing, and integration of merged changes from other branches, highlighting a focus on performance, reliability, and code quality. These changes are critical for effective caching behavior.
memcachedtwitter
twitter/pelikan
Jun 2014 - Dec 2022
Pelikan is Twitter's unified cache backend
Role in this project:Back-end Developer
Back-end DeveloperContributions:5 releases, 240 reviews, 462 commits in 8 years 7 months
Contributions summary:Yao's commits indicate a focus on implementing core backend features and data storage within the Twitter's Pelikan unified cache backend. The user introduced new code and logic related to processing memcached commands (GET, GETS, and DELETE), particularly focusing on the implementation of a sorted array data structure (sarray) as the base for the cache. Furthermore, the user integrated functionalities such as metric collection for analyzing cache performance.
cache-backendcachingbackendcachetwitter
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