Publications

ColdMap: Compaction-Aware Cost-Benefit Zone Cleaning for ZNS-Based Key-Value Stores

Sungjin Byeon, Kyungwook Min, Jaewan Park, Sangyun Lee, Hong-Yeon Kim, Junyoung Han, Joo-Young Hwang, Zhichao Cao, Youngjae Kim

ACM ICS 2026 · To Appear

ANCHOR: A Vision for Secure Persistent Key-Value Stores in Disaggregated Data Centers

Viraj Thakkar, Dongha Kim, Hokeun Kim, Zhichao Cao

ACM SeQureDB 2026 · To Appear

O^3-LSM: Maximizing Disaggregated LSM Write Performance via Three-Layer Offloading

Qi Lin, Gangqi Huang, Te Guo, Chang Guo, Viraj Thakkar, Zichen Zhu, Jianguo Wang, Zhichao Cao

ACM SIGMOD 2026 · To Appear

ProGQL: A Provenance Graph Query System for Cyber Attack Investigation

Fei Shao, Jia Zou, Zhichao Cao, Xusheng Xiao

ICDE 2026 · To Appear

Bit-Flip Error Resilience in LLMs: A Comprehensive Analysis and Defense Framework

Yuhang Chen, Zhen Tan, Ajay Kumar Jaiswal, Huaizhi Qu, Xinyu Zhao, Qi Lin, Yu Cheng, Andrew Kwong, Zhichao Cao, Tianlong Chen

EMNLP 2025 · 01 Nov 2025 · https://doi.org/10.18653/v1/2025.emnlp-main.528

LegoIndex: A Scalable and Modular Indexing Framework for Efficient Analysis of Extreme-Scale Particle Data

Chang Guo, Ning Yan, Lipeng Wan, Zhichao Cao

HPDC 2025 · 20 Jul 2025 · https://dl.acm.org/doi/10.1145/3731545.3731591

Unlocking the Unusable: A Proactive Caching Framework for Reusing Partial Overlapped Data

Chang Guo, Norbert Podhorszki, Greg Eisenhauer, Zhiwen Xie, Scott Klasky, Zhichao Cao

ACM HotStorage 2025 · 10 Jul 2025 · https://dl.acm.org/doi/10.1145/3736548.3737839

SHIELD: Encrypting Persistent Data of LSM-KVS from Monolithic to Disaggregated Storage

Viraj Thakkar, Dongha Kim, Yingchun Lai, Hokeun Kim, Zhichao Cao

ACM SIGMOD 2025 · 17 Jun 2025 · https://dl.acm.org/doi/10.1145/3725354

CPI: A Collaborative Partial Indexing Design for Large-Scale Deduplication Systems

Yixun Wei, Zhichao Cao, David H.C. Du

IEEE Transactions on Computers · 08 Dec 2024 · https://doi.org/10.1109/TC.2024.3485238

BIZA: Design of Self-Governing Block-Interface ZNS AFA for Endurance and Performance

Shushu Yi, Shaocong Sun, Li Peng, Yingbo Sun, Ming-Chang Yang, Zhichao Cao, Qiao Li, Myoungsoo Jung, Ke Zhou, Jie Zhang

ACM SOSP 2024 · 04 Nov 2024 · https://doi.org/10.1145/3694715.3695953

Can ZNS SSDs be Better Storage Devices for Persistent Cache?

Chongzhuo Yang, Zhang Cao, Chang Guo, Ming Zhao, Zhichao Cao

ACM HotStorage 2024 · 08 Jul 2024 · https://doi.org/10.1145/3655038.3665946

Can Modern LLMs Tune and Configure LSM-based Key-Value Stores?

Viraj Thakkar, Madhumitha Sukumar, Jiaxin Dai, Kaushiki Singh, Zhichao Cao

ACM HotStorage 2024 · 08 Jul 2024 · https://doi.org/10.1145/3655038.3665954

Prophet: Optimizing LSM-Based Key-Value Store on ZNS SSDs with File Lifetime Prediction and Compaction Compensation

Gaoji Liu, Chongzhuo Yang, Qiaolin Yu, Chang Guo, Wen Xia, Zhichao Cao

MSST 2024 · 03 Jun 2024

SAS-Cache: A Semantic-Aware Secondary Cache for LSM-based Key-Value Stores

Zhang Cao, Chang Guo, Ziyan Lv, Anand Ananthabhotla, Zhichao Cao

MSST 2024 · 03 Jun 2024

CaaS-LSM: Compaction-as-a-Service for LSM-based Key-Value Stores in Storage Disaggregated Infrastructure

Qiaolin Yu, Chang Guo, Jay Zhuang, Viraj Thakkar, Jianguo Wang, Zhichao Cao

ACM SIGMOD 2024 · 29 May 2024 · https://doi.org/10.1145/3654927

HyzoneStore: Hybrid Storage with Flexible Logical Interface and Optimized Cache for Zoned Devices

Chongzhuo Yang, Baolin Feng, Zhang Cao, Zhichao Cao

ACM DSDE 2024 · 27 Feb 2024 · https://doi.org/10.1145/3653924.3653935

SMRTS: A Performance and Cost-Effectiveness Optimized SSD-SMR Tiered File System with Data Deduplication

Zhichao Cao, Hao Wen, Fenggang Wu, David H.C. Du

IEEE ICCD 2023 · 06 Nov 2023 · https://doi.org/10.1109/ICCD58817.2023.00050

K8sES: Optimizing Kubernetes with Enhanced Storage Service-Level Objectives

Hao Wen, Zhichao Cao, Bingzhe Li, David H.C. Du, Ayman Abouelwafa, Doug Voigt, Shiyong Liu, Jim Diehl, Fenggang Wu

IEEE ICCD 2023 · 06 Nov 2023 · https://doi.org/10.1109/ICCD58817.2023.00041