Publications

Probe Less, Learn More: Characterizing and Correcting eBPF Instrumentation Overhead

Viraj Thakkar, Timo Sokler, John Byrne, MJ Son, Sekwon Lee, Harumi Kuno, Aditya Dhakal

ProTools Workshop @ SC (8th Workshop on Programming and Performance Visualization Tools) · 2026

Under review

TellyTune: Exploring the Limits of LLM-Driven Tuning for LSM-Based Key-Value Stores

Viraj Thakkar, Qi Lin, Kenanya Prasetyo, Raden Wisjnunandono, Jin Wang, Achmad Kistijantoro, Reza Rachmadi, Zhichao Cao

SYSTOR (19th ACM International Systems and Storage Conference) · 2026 · To appear

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

Viraj Thakkar, Dongha Kim, Hokeun Kim, Zhichao Cao

SeQureDB Workshop @ ACM SIGMOD · 2026 · To appear

O3-LSM: Maximizing Disaggregated LSM Write Performance via Three-Layer Offloading

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

SIGMOD (Proc. ACM Manag. Data) · 2026

DOIBibTeX

@article{lin2026o3lsm,
  title   = {O3-LSM: Maximizing Disaggregated LSM Write Performance via Three-Layer Offloading},
  author  = {Lin, Qi and Huang, Gangqi and Guo, Te and Guo, Chang and Thakkar, Viraj and Zhu, Zhichen and Wang, Jianguo and Cao, Zhichao},
  journal = {Proceedings of the ACM on Management of Data (SIGMOD)},
  year    = {2026},
  doi     = {10.1145/3802093}
}

CacheFS: A Global, Strongly Consistent, Client-Sided Caching Filesystem

John Byrne, Viraj Thakkar, Matthias Frank, Elias Klett, Harumi Kuno, Sekwon Lee, Clarete Crasta, Abhishek Dwaraki, David Emberson, Ramya Rao, Amitha C, Chinmay Ghosh, Prono Shome, Shreyas Basri

HPE TechCon (internal conference — 8% acceptance) · 2026

Broad Reasoning but Narrow Control for an End-to-End KVS Tuner

Viraj Thakkar

HPTS (21st International Workshop on High Performance Transaction Systems) · 2026

Beyond ARC — Introducing LLM-driven Adaptive Policy Replacement

Zhenjie Sun, Viraj Thakkar, Avani Wildani, Zhichao Cao

USENIX FAST Work-In-Progress · 2026

Characterizing Sustained Low-Level Message Latency

John Byrne, Myungjun Son, Harumi Kuno, Aditya Dhakal, Sekwon Lee, Viraj Thakkar, Clarete Crasta, David Emberson

Conference for the Cray User Group (CUG) · 2026

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

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

SIGMOD (Proc. ACM Manag. Data) · 2025

DOIBibTeX

@inproceedings{thakkar2025shield,
  title     = {SHIELD: Encrypting Persistent Data of LSM-KVS from Monolithic to Disaggregated Storage},
  author    = {Thakkar, Viraj and Kim, Dongha and Lai, Yingchun and Kim, Hokeun and Cao, Zhichao},
  booktitle = {Proceedings of the ACM SIGMOD International Conference on Management of Data},
  year      = {2025},
  doi       = {10.1145/3725354}
}

NetLSM: Enabling an In-Network Approach for Scheduling LSM-KVS Operations

Yibo Zhao, Viraj Thakkar, Zhichao Cao, Zaoxing Liu

USENIX FAST Work-In-Progress · 2025

ELMo-Tune-V2: LLM-Assisted Full-Cycle Auto-Tuning to Optimize LSM-Based Key-Value Stores

Viraj Thakkar, Qi Lin, Kenanya Keandra Adriel Prasetyo, Raden Haryosatyo Wisjnunandono, Achmad Imam Kistijantoro, Reza Fuad Rachmadi, Zhichao Cao

arXiv preprint arXiv:2502.17606 · 2025

LinkBibTeX

@article{thakkar2025elmotunev2,
  title   = {ELMo-Tune-V2: LLM-Assisted Full-Cycle Auto-Tuning to Optimize LSM-Based Key-Value Stores},
  author  = {Thakkar, Viraj and Lin, Qi and Prasetyo, Kenanya Keandra Adriel and Wisjnunandono, Raden Haryosatyo and Kistijantoro, Achmad Imam and Rachmadi, Reza Fuad and Cao, Zhichao},
  journal = {arXiv preprint arXiv:2502.17606},
  year    = {2025}
}

StorageXTuner: An LLM Agent-Driven Automatic Tuning Framework for Heterogeneous Storage Systems

Qi Lin, Zhenyu Zhang, Viraj Thakkar, Zhenjie Sun, Mai Zheng, Zhichao Cao

arXiv preprint arXiv:2510.25017 · 2025

LinkBibTeX

@article{lin2025storagextuner,
  title   = {StorageXTuner: An LLM Agent-Driven Automatic Tuning Framework for Heterogeneous Storage Systems},
  author  = {Lin, Qi and Zhang, Zhenyu and Thakkar, Viraj and Sun, Zhenjie and Zheng, Mai and Cao, Zhichao},
  journal = {arXiv preprint arXiv:2510.25017},
  year    = {2025}
}

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

SIGMOD (Proc. ACM Manag. Data) · 2024

DOIBibTeX

@article{yu2024caaslsm,
  title   = {CaaS-LSM: Compaction-as-a-Service for LSM-based Key-Value Stores in Storage Disaggregated Infrastructure},
  author  = {Yu, Qiaolin and Guo, Chang and Zhuang, Jay and Thakkar, Viraj and Wang, Jianguo and Cao, Zhichao},
  journal = {Proceedings of the ACM on Management of Data (SIGMOD)},
  volume  = {2},
  number  = {3},
  year    = {2024},
  doi     = {10.1145/3654927}
}

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

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

HotStorage '24 (16th ACM Workshop on Hot Topics in Storage and File Systems) · 2024

Best PaperDOIBibTeX

@inproceedings{thakkar2024llmtune,
  title     = {Can Modern LLMs Tune and Configure LSM-based Key-Value Stores?},
  author    = {Thakkar, Viraj and Sukumar, Madhumitha and Dai, Jiaxin and Singh, Kaushiki and Cao, Zhichao},
  booktitle = {Proceedings of the 16th ACM Workshop on Hot Topics in Storage and File Systems (HotStorage)},
  pages     = {116--123},
  year      = {2024},
  doi       = {10.1145/3655038.3665954}
}

LLM-assisted Automatic-Configuration and Tuning Framework for LSM-based Key-Value Stores

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

USENIX FAST Work-In-Progress · 2024

FLASH: Web-Form's Logical Analysis & Session Handling — Automatic Form Classification and Filling on Surface and Dark Web

Ashwini Dalvi, Viraj Thakkar, Smit Moradiya, Aditya Vedpathak, Irfan Siddavatam, Faruk Kazi, S. G. Bhirud

Robotic Process Automation (Wiley) · 2023

DOIBibTeX

@incollection{dalvi2023flash,
  title     = {FLASH: Web-Form's Logical Analysis \& Session Handling - Automatic Form Classification and Filling on Surface and Dark Web},
  author    = {Dalvi, Ashwini and Thakkar, Viraj and Moradiya, Smit and Vedpathak, Aditya and Siddavatam, Irfan and Kazi, Faruk and Bhirud, S. G.},
  booktitle = {Robotic Process Automation},
  pages     = {61--100},
  publisher = {Wiley},
  year      = {2023},
  doi       = {10.1002/9781394166954.ch5}
}

Optimizing Consistency and Performance Trade-off in Distributed Log-Structured Merge-Tree-based Key-Value Stores

Viraj Deven Thakkar

M.S. Thesis, Arizona State University · 2023

LinkBibTeX

@mastersthesis{thakkar2023optimizing,
  title  = {Optimizing Consistency and Performance Trade-off in Distributed Log-Structured Merge-Tree-based Key-Value Stores},
  author = {Thakkar, Viraj Deven},
  school = {Arizona State University},
  year   = {2023}
}

ML-enabled Informed Intervention for Crowdsourcing-based Optimization of Medical Resources

Irfan Siddavatam, Ashwini Dalvi, Abhishek Patel, Aditya Panchal, Aditya S. Vedpathak, Viraj Thakkar

Handbook of Research on Applied Intelligence for Health and Clinical Informatics (IGI Global) · 2022

DOIBibTeX

@incollection{siddavatam2022mlenabled,
  title     = {ML-enabled Informed Intervention for Crowdsourcing-based Optimization of Medical Resources},
  author    = {Siddavatam, Irfan and Dalvi, Ashwini and Patel, Abhishek and Panchal, Aditya and Vedpathak, Aditya S. and Thakkar, Viraj},
  booktitle = {Handbook of Research on Applied Intelligence for Health and Clinical Informatics},
  publisher = {IGI Global},
  year      = {2022},
  doi       = {10.4018/978-1-7998-7709-7.ch017}
}

Recognizing Child Unsafe Apps through User Reviews on the Google Play Store

Ashwini Dalvi, Irfan Siddavatam, Viraj Thakkar, Aditya Vedpathak, Abhishek Patel

Advanced Computing and Intelligent Technologies (Springer) · 2022

DOIBibTeX

@inproceedings{dalvi2022recognizing,
  title     = {Recognizing Child Unsafe Apps through User Reviews on the Google Play Store},
  author    = {Dalvi, Ashwini and Siddavatam, Irfan and Thakkar, Viraj and Vedpathak, Aditya and Patel, Abhishek},
  booktitle = {Advanced Computing and Intelligent Technologies},
  pages     = {111--120},
  publisher = {Springer},
  year      = {2022},
  doi       = {10.1007/978-981-16-2164-2_9}
}

Link Harvesting on the Dark Web

Ashwini Dalvi, Irfan Siddavatam, Viraj Thakkar, Apoorva Jain, Faruk Kazi, Sunil Bhirud

IEEE Bombay Section Signature Conference (IBSSC) · 2021

DOIBibTeX

@inproceedings{dalvi2021link,
  title     = {Link Harvesting on the Dark Web},
  author    = {Dalvi, Ashwini and Siddavatam, Irfan and Thakkar, Viraj and Jain, Apoorva and Kazi, Faruk and Bhirud, Sunil},
  booktitle = {2021 IEEE Bombay Section Signature Conference (IBSSC)},
  pages     = {1--5},
  year      = {2021},
  doi       = {10.1109/IBSSC53889.2021.9673428}
}

Explainability using Decision Trees and Monte Carlo Simulations

Irfan Siddavatam, Ashwini Dalvi, Viraj Thakkar, Aditya Vedpathak, Smit Moradiya, Apoorva Jain

4th Int'l Conference on Advances in Science & Technology (ICAST) · 2021

DOIBibTeX

@techreport{siddavatam2021explainability,
  title       = {Explainability using Decision Trees and Monte Carlo Simulations},
  author      = {Siddavatam, Irfan and Dalvi, Ashwini and Thakkar, Viraj and Vedpathak, Aditya and Moradiya, Smit and Jain, Apoorva},
  institution = {Social Science Research Network (SSRN)},
  number      = {ID 3868707},
  year        = {2021},
  doi         = {10.2139/ssrn.3868707}
}