Chaoyi Ruan (Francis)

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Email: ruancy [at] comp [dot] nus [dot] edu [dot] sg

I am a Postdoctoral Researcher at the National University of Singapore (NUS). Prior to joining NUS, I completed my PhD at the University of Science and Technology of China (USTC), where I was advised by Prof. Cheng Li. I also earned my bachelor’s degree from USTC. During my PhD, I was fortunate to work with Prof. Cheng Li at USTC, Prof. Xiaosong Ma at MBZUAI, Yingqiang Zhang, Hao Chen, Feifei Li, and other brilliant collaborators from Alibaba.

My research interests include distributed databases, resource disaggregation, and AI systems.

selected publications

  1. NSDI
    Libra: Flexible Request Partitioning and Scheduling for Serving Unbalanced and Dynamic LLM Workloads
    Chaoyi Ruan, Yinhe Chen, Dongqi Tian, and 4 more authors
    In Proc. of the USENIX Symposium on Networked Systems Design and Implementation (NSDI), 2026
  2. NSDI
    Cortex: Achieving Low-Latency, Cost-Efficient Remote Data Access For LLM via Semantic-Aware Knowledge Caching
    Chaoyi Ruan, Chao Bi, Kaiwen Zheng, and 3 more authors
    In Proc. of the USENIX Symposium on Networked Systems Design and Implementation (NSDI), 2026
  3. ICLR
    Revisiting Parameter Server in LLM Post-Training
    Xinyi Wan, Penghui Qi, Guangxing Huang, and 3 more authors
    In Proc. of the International Conference on Learning Representations (ICLR), 2026
  4. VLDB
    Adapting to Data Affinity Changes in Geo-Replicated Database via Row-Level Paxos- Group Affiliation Re-Assignment
    Chaoyi Ruan, Yingqiang Zhang, Juncheng Zhang, and 6 more authors
    Proc. VLDB Endow., 2025
  5. ICCD
    DHeLlam: General-Purpose, Automatic Micro-batch Co-execution for Distributed LLM Training
    Haiquan Wang*, Chaoyi Ruan*, Jia He, and 4 more authors
    In Proc. of the IEEE International Conference on Computer Design (ICCD), 2025
    Awarded
  6. ASPLOS
    Persistent Memory Disaggregation for Cloud-Native Relational Databases
    Chaoyi Ruan, Yingqiang Zhang, Chao Bi, and 7 more authors
    In Proceedings of the 28th ACM International Conference on Architectural Support for Programming Languages and Operating Systems, Volume 3, Vancouver, BC, Canada, 2023
    DOI
  7. VLDB
    Towards cost-effective and elastic cloud database deployment via memory disaggregation
    Yingqiang Zhang*, Chaoyi Ruan*, Cheng Li, and 8 more authors
    Proc. VLDB Endow., Jun 2021
    DOI
  8. FAST
    SpanDB: A fast, Cost-Effective LSM-tree based KV store on hybrid storage
    Hao Chen, Chaoyi Ruan, Cheng Li, and 2 more authors
    In 19th USENIX Conference on File and Storage Technologies (FAST 21), Jun 2021