About Me

I am a PhD student (since 2023) advised by Prof. Youyou Lu and Jiwu Shu. My research interests lie in file systems and vector storage.

Education

News

• May, 2023. SuperFS got No.1 in the I0500 Research Overall Score.

• Nov, 2022. SuperFS got No.1 in the metadata performance of the IO500 10-node list. SuperFS is a distributed file system that leverages emerging NVMe, RDMA, and PM technologies.

Publication Lists

• High-Throughput, Cost-Effective Billion-Scale Vector Search with a Single GPU.
  
  Haodi Jiang, Hao Guo, Minhui Xie, Jiwu Shu, Youyou Lu,
  
  ACM SIGMOD International Conference on Management of Data (SIGMOD'26), 2026
  Paper
• OdinANN: Direct Insert for Consistently Stable Performance in Billion-Scale Graph-Based Vector Search.
  
  Hao Guo, Youyou Lu,
  
  The 24th USENIX Conference on File and Storage Technologies (FAST'26), 2026
  Paper Star
• Achieving Low-Latency Graph-Based Vector Search via Aligning Best-First Search Algorithm with SSD.
  
  Hao Guo, Youyou Lu,
  
  The 19th USENIX Symposium on Operating Systems Design and Implementation (OSDI'25), 2025
  Invited for fast-tracked publication in ACM Transactions on Storage
  Paper Star
• Frugal: Efficient and Economic Embedding Model Training with Commodity GPUs.
  
  Minhui Xie, Shaoxun Zeng, Hao Guo, Shiwei Gao, Youyou Lu,
  
  The 30th Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS'25), 2025
  Paper
• Volley: Accelerating Write-Read Orders in Disaggregated Storage.
  
  Shaoxun Zeng, Xiaojian Liao, Hao Guo, Youyou Lu,
  
  The 19th European Conference on Computer Systems (EuroSys'24), 2024
  Paper
• 面向高速硬件的高性能文件系统.
  
  Youyou Lu, Hao Guo, Shaoxun Zeng, Yitian Yang,
  
  中国计算机学会通讯 (中国计算机学会通讯), 2024
  Paper
• SingularFS: A Billion-Scale Distributed File System Using a Single Metadata Server.
  
  Hao Guo, Youyou Lu, Wenhao Lv, Xiaojian Liao, Shaoxun Zeng, Jiwu Shu,
  
  USENIX Annual Technical Conference (USENIX ATC'23), 2023
  Paper

Honors Awarded

• Comprehensive Excellent Scholarship, Tsinghua University, 2024
• Beijing Outstanding Undergraduate Graduation Thesis (28 in Tsinghua), 2023
• Magna Cum Laude, Tsinghua University (Top 10%), 2023
• Nanxiang Jiang Scholarship (Top 1%), Tsinghua University, 2021

Teaching

• TA, Computer Organization and Architecture, Spring 2025
• TA, Computer Organization, Autumn 2024
• TA, Storage Technology Foundations, Spring 2024