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

WorkshopProTools @ SC 2026Under 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 Imam Kistijantoro, Reza Faud Rachmadi, Zhichao Cao

ConferenceSYSTOR 2026DOICodeBibTeX

@inproceedings{10.1145/3793230.3839381,
  author = {Thakkar, Viraj and Lin, Qi and Prasetyo, Kenanya and Wisjnunandono, Haryosatyo and Wang, Jin and Kistijantoro, Achmad Imam and Rachmadi, Reza Fuad and Cao, Zhichao},
  title = {TellyTune: Exploring the Limits of LLM-Assisted Tuning for LSM-Based Key-Value Stores},
  year = {2026},
  isbn = {9798400724732},
  publisher = {Association for Computing Machinery},
  address = {New York, NY, USA},
  url = {https://doi.org/10.1145/3793230.3839381},
  doi = {10.1145/3793230.3839381},
  pages = {81–96},
  numpages = {16},
  series = {SYSTOR '26}
}

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

Viraj Thakkar, Dongha Kim, Hokeun Kim, Zhichao Cao

WorkshopSeQureDB @ SIGMOD 2026To 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

ConferenceSIGMOD 2026DOICodeBibTeX

@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

ConferenceHPE TechCon 2026

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

Viraj Thakkar

AbstractHPTS 2026

Beyond ARC — Introducing LLM-driven Adaptive Policy Replacement

Zhenjie Sun, Viraj Thakkar, Avani Wildani, Zhichao Cao

AbstractFAST WiP 2026

Characterizing Sustained Low-Level Message Latency

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

AbstractCUG 2026

System for Observability using eBPF

Harumi Kuno, Viraj Thakkar, John Byrne, Timo Soekler, Myungjun Son, Sekwon Lee, Aditya Dhakal

PatentHPE 2026

Under HPE internal disclosure review; patent filing upon approval

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

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

ConferenceSIGMOD 2025DOICodeBibTeX

@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

AbstractFAST WiP 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

PreprintarXiv 2025LinkCodeBibTeX

@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

PreprintarXiv 2025LinkBibTeX

@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}
}

A Global, Strongly Consistent, Client-Sided Caching Mechanism

John Byrne, Viraj Thakkar, Harumi Kuno, Sekwon Lee

PatentHPE 2025

Under HPE internal disclosure review; patent filing upon approval

Federated Coherence Management for a Globally Shared Cache

John Byrne, Viraj Thakkar, Harumi Kuno, Sekwon Lee

PatentHPE 2025

Under HPE internal disclosure review; patent filing upon approval

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

ConferenceSIGMOD 2024DOICodeBibTeX

@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

WorkshopHotStorage 2024Best PaperDOICodeBibTeX

@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

AbstractFAST WiP 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

Book ChapterRobotic Process Automation, Wiley 2023DOIBibTeX

@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 Thakkar

ThesisArizona State University 2023LinkBibTeX

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

Book ChapterIGI Global Handbook 2022DOIBibTeX

@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

ConferenceSpringer ACIT 2022DOIBibTeX

@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

ConferenceIBSSC 2021DOIBibTeX

@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

ConferenceICAST 2021DOIBibTeX

@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}
}