About Me

I am a post-doc and build distributed memory/storage systems with fast and smart hardware.

Education

Research

I build distributed memory/storage systems for modern datacenters, which is motivated by some hardware trends:

• New network: RDMA and CXL, extending memory semantic to remote servers or IO devices
• New memory: persistent memory (PM), providing memory-level storage
• New compute: RMT switch ASIC and SmartNICs, offering computing power on the path of memory accesses
• New architecture: hardware memory disaggregation, enabling independent scaling of memory and compute

Here are some related projects:

• Lifting network-level knowledge to storage software
  • Leveraging NIC hardware ACKs for fast commit (NSDI’25)
• Distributed protocols with network supports
  • In-network cache coherence (FAST’21)
  • RDMA primitives for PM replication (OSDI’23)
• Indexes for different network links
  • NUMA-aware PM index (OSDI’21, TOS’22)
  • RDMA-based index on disaggregated memory (SIGMOD’22, EuroSys’25)
• Memory management
  • Memory compaction (USENIX ATC’22)
  • Protective remote memory (FAST’23)
  • SSD-extended remote memory (FAST’24)
• Concurrency
  • SmartNIC-accelerated scheduling (USENIX ATC’22)
  • One-sided Range locks (FAST’23)
  • Transactions (VLDB’22, DAC’20)

Peer-Reviewed Publications

2025

• Achieving Wire-Latency Storage Systems by Exploiting Hardware ACKs.
  
  Qing Wang, Jiwu Shu, Jing Wang, Yuhao Zhang,
  
  The 22nd USENIX Symposium on Networked Systems Design and Implementation (NSDI'25), 2025
  Paper
• Deft: A Scalable Tree Index for Disaggregated Memory.
  
  Jing Wang, Qing Wang, Yuhao Zhang, Jiwu Shu,
  
  The 20th European Conference on Computer Systems (EuroSys'25), 2025
  Paper Star

2024

• TeRM: Extending RDMA-Attached Memory with SSD.
  
  Zhe Yang, Qing Wang, Xiaojian Liao, Youyou Lu, Keji Huang, Jiwu Shu,
  
  The 22nd USENIX Conference on File and Storage Technologies (FAST'24), 2024
  Invited for fast-tracked publication in ACM Transactions on Storage
  Paper Star
• Efficiently Enlarging RDMA-Attached Memory with SSD.
  
  Zhe Yang, Qing Wang, Xiaojian Liao, Youyou Lu, Keji Huang, Jiwu Shu,
  
  ACM Transactions on Storage (TOS), 2024
  Fast-tracked
  Paper Star
• Perseid: A Secondary Indexing Mechanism for LSM-based Storage Systems.
  
  Jing Wang, Youyou Lu, Qing Wang, Yuhao Zhang, Jiwu Shu,
  
  ACM Transactions on Storage (TOS), 2024
  Fast-tracked
  Paper Star
• Challenges and Technical Development of Large Model Training Storage Systems.
  
  Yangyang Feng, Qing Wang, Minhui Xie, Jiwu Shu,
  
  Journal of Computer Research and Development , 2024
  Paper

2023

• Replicating Persistent Memory Key-Value Stores with Efficient RDMA Abstraction.
  
  Qing Wang, Youyou Lu, Jing Wang, Jiwu Shu,
  
  The 17th USENIX Symposium on Operating Systems Design and Implementation (OSDI'23), 2023
  Paper
• Building Write-Optimized Tree Indexes on Disaggregated Memory.
  
  Qing Wang, Youyou Lu, Jiwu Shu,
  
  SIGMOD Record, March 2023 (Vol. 52, No. 1) , 2023
  Invited
  Paper Star
• Revisiting Secondary Indexing in LSM-based Storage Systems with Persistent Memory.
  
  Jing Wang, Youyou Lu, Qing Wang, Yuhao Zhang, Jiwu Shu,
  
  USENIX Annual Technical Conference (USENIX ATC'23), 2023
  Invited for fast-tracked publication in ACM Transactions on Storage
  Paper Star
• Patronus: High-Performance and Protective Remote Memory.
  
  Bin Yan, Youyou Lu, Qing Wang, Minhui Xie, Jiwu Shu,
  
  The 21st USENIX Conference on File and Storage Technologies (FAST'23), 2023
  Paper Star
• Citron: Distributed Range Lock Management with One-sided RDMA.
  
  Jian Gao, Youyou Lu, Minhui Xie, Qing Wang, Jiwu Shu,
  
  The 21st USENIX Conference on File and Storage Technologies (FAST'23), 2023
  Paper
• PetPS: Supporting Huge Embedding Models with Persistent Memory.
  
  Minhui Xie, Youyou Lu, Qing Wang, Yangyang Feng, Jiaqiang Liu, Kai Ren, Jiwu Shu,
  
  The 49th International Conference on Very Large Data Bases (VLDB'23), 2023
  Paper Star
• Survey on In-Network Storage Systems.
  
  Qing Wang, Junru Li, Jiwu Shu,
  
  Journal of Computer Research and Delevopment (in Chinese) , 2023
  Paper
• Progress on Storage Systems for Disaggregated Data Centers.
  
  Jiwu Shu, Youmin Chen, Qing Wang, Jing Wang, Junru Li, Xiaojian liao,
  
  SCIENTIA SINICA Informationis , 2023
  Paper

2022

• Sherman: A Write-Optimized Distributed B+Tree Index on Disaggregated Memory.
  
  Qing Wang, Youyou Lu, Jiwu Shu,
  
  ACM SIGMOD International Conference on Management of Data (SIGMOD'22), 2022
  2023 ACM SIGMOD Research Highlight Award
  PaperDigest Most Influential SIGMOD Papers (version 2023-04) [link]
  Paper Slides Star
• Nap: Persistent Memory Indexes for NUMA Architectures.
  
  Qing Wang, Youyou Lu, Junru Li, Minhui Xie, Jiwu Shu,
  
  ACM Transactions on Storage (TOS), 2022
  Fast tracked
  Paper
• AlNiCo: SmartNIC-accelerated Contention-aware Request Scheduling for Transaction Processing.
  
  Junru Li, Youyou Lu, Qing Wang, Jiazhen Lin, Zhe Yang, Jiwu Shu,
  
  USENIX Annual Technical Conference (USENIX ATC'22), 2022
  Paper
• Pacman: An Efficient Compaction Approach for Log-Structured Key-Value Store on Persistent Memory.
  
  Jing Wang, Youyou Lu, Qing Wang, Minhui Xie, Keji Huang, Jiwu Shu,
  
  USENIX Annual Technical Conference (USENIX ATC'22), 2022
  Paper Star
• Fleche: An Efficient GPU Embedding Cache for Personalized Recommendations.
  
  Minhui Xie, Youyou Lu, Jiazhen Lin, Qing Wang, Jian Gao, Kai Ren, Jiwu Shu,
  
  The 17th European Conference on Computer Systems (EuroSys'22), 2022
  Paper Slides
• SwitchTx: Scalable In-Network Coordination for Distributed Transaction Processing.
  
  Junru Li, Youyou Lu, Yiming Zhang, Qing Wang, Zhuo Cheng, Keji Huang, Jiwu Shu,
  
  The 48th International Conference on Very Large Data Bases (VLDB'22), 2022
  Paper Slides

2021

• Nap: A Black-Box Approach to NUMA-Aware Persistent Memory Indexes.
  
  Qing Wang, Youyou Lu, Junru Li, Jiwu Shu,
  
  The 15th USENIX Symposium on Operating Systems Design and Implementation (OSDI'21), 2021
  Invited for fast-tracked publication in ACM Transactions on Storage
  Paper Star
• Concordia: Distributed Shared Memory with In-Network Cache Coherence.
  
  Qing Wang, Youyou Lu, Erci Xu, Junru Li, Youmin Chen, Jiwu Shu,
  
  USENIX Conference on File and Storage Technologies (FAST'21), 2021
  Paper
• Octopus+: an RDMA-enabled Distributed Persistent Memory File System.
  
  Bohong Zhu, Youmin Chen, Qing Wang, Youyou Lu, Jiwu Shu,
  
  ACM Transactions on Storage (TOS), 2021
  Paper
• Aria: Tolerating Skewed Workloads in Secure In-memory Key-value Stores.
  
  Fan Yang, Youmin Chen, Youyou Lu, Qing Wang, Jiwu Shu,
  
  37th IEEE International Conference on Data Engineering (ICDE'21), 2021
  Paper
• A Multicore-Friendly Persistent Memory Key-Value Store.
  
  Qing Wang, Bohong Zhu, Jiwu Shu,
  
  Journal of Computer Research and Delevopment (in Chinese) , 2021
  Paper

2020

• Improving the Concurrency Performance of Persistent Memory Transactions on Multicores.
  
  Qing Wang, Youyou Lu, Zhongjie Wu, Fan Yang, Jiwu Shu,
  
  Design Automation Conference (DAC'20), 2020
  Paper
• FlatStore: an Efficient Log-Structured Key-Value Storage Engine for Persistent Memory.
  
  Youmin Chen, Youyou Lu, Fan Yang, Qing Wang, Yang Wang, Jiwu Shu,
  
  Proceedings of the Twenty-Fifth International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS'20), 2020
  Paper Slides
• μTree: a Persistent B+-Tree with Low Tail Latency.
  
  Youmin Chen, Youyou Lu, Kedong Fang, Qing Wang, Jiwu Shu,
  
  46th International Conference on Very Large Data Bases (VLDB'20), 2020
  Paper Slides
• TH-DPMS: Design and Implementation of an RDMA-enabled Distributed Persistent Memory Storage System.
  
  Jiwu Shu, Youmin Chen, Qing Wang, Bohong Zhu, Junru Li, Youyou Lu,
  
  ACM Transactions on Storage (TOS), 2020
  Paper

Selected Honors

• 2023 ACM SIGMOD Research Highlight Award (link)
• Microsoft Research PhD Fellowship, 2021 (link)

Services

• ACM Transactions on Storage (TOS), 2021, Reviewer