Sangjin Lee

Bio and Interests

I am a Senior Researcher at the eXascale Infolab at the University of Fribourg, Switzerland. I received my Ph.D. in Electronics and Computer Engineering (ECE) from Hanyang University under the supervision of Prof. Yong Ho Song and Prof. Jinsub Park in 2022 in Seoul, South Korea. I also got my BSc in ECE at Hanyang University under Prof. Yong Ho Song in 2014 in Seoul, South Korea.

My research interests include computer storage systems, especially exploring architectures to deliver better performance from a host interface perspective.

Recent Publications

1. Michal Friedman, Sangjin Lee, Alberto Lerner, and Gustavo Alonso. “Understanding CXL: Memory, Coherence, and Opportunities in System Design.” 2025 International Conference on Architectural Support for Programming Languages and Operating Systems (To Appear). ASPLOS’25, 2025. Bibtex

   Understanding CXL: Memory, Coherence, and Opportunities in System Design

   Michal Friedman, Sangjin Lee, Alberto Lerner, and Gustavo Alonso. “Understanding CXL: Memory, Coherence, and Opportunities in System Design.” 2025 International Conference on Architectural Support for Programming Languages and Operating Systems (To Appear). ASPLOS’25, 2025.

   @misc{cxl2025asplos,
     author = {Friedman, Michal and Lee, Sangjin and Lerner, Alberto and Alonso, Gustavo},
     title = {Understanding {CXL}: Memory, Coherence, and Opportunities in System Design},
     year = {2025},
     booktitle = {2025 International Conference on Architectural Support for Programming Languages and Operating Systems (To Appear)},
     series = {ASPLOS’25}
   }
   

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2. Kibin Park, Alberto Lerner, Sangjin Lee, Philippe Bonnet, Yong Ho Song, Philippe Cudré-Mauroux, and Jungwook Choi. “BABOL: A Software-Defined NAND Flash Controller.” In 57th IEEE/ACM International Symposium on Microarchitecture (To Appear). MICRO 2024, 2024. Bibtex PDF

   BABOL: A Software-Defined NAND Flash Controller

   Kibin Park, Alberto Lerner, Sangjin Lee, Philippe Bonnet, Yong Ho Song, Philippe Cudré-Mauroux, and Jungwook Choi. “BABOL: A Software-Defined NAND Flash Controller.” In 57th IEEE/ACM International Symposium on Microarchitecture (To Appear). MICRO 2024, 2024.

   @inproceedings{kibin2024,
     author = {Park, Kibin and Lerner, Alberto and Lee, Sangjin and Bonnet, Philippe and Song, Yong Ho and Cudr{\'e}-Mauroux, Philippe and Choi, Jungwook},
     title = {{BABOL}: A Software-Defined {NAND} Flash Controller},
     year = {2024},
     booktitle = {57th IEEE/ACM International Symposium on Microarchitecture (To Appear)},
     series = {{MICRO} 2024},
     url = {/assets/pdf/2024_micro_flash_controller.pdf}
   }
   

   ×
3. Sangjin Lee, Alberto Lerner, Philippe Bonnet, and Philippe Cudré-Mauroux. “Database Kernels: Seamless Integration of Database Systems and Fast Storage via CXL.” In 14th Conference on Innovative Data Systems Research (CIDR’24), 2024. Bibtex PDF

   Database Kernels: Seamless Integration of Database Systems and Fast Storage via CXL

   Sangjin Lee, Alberto Lerner, Philippe Bonnet, and Philippe Cudré-Mauroux. “Database Kernels: Seamless Integration of Database Systems and Fast Storage via CXL.” In 14th Conference on Innovative Data Systems Research (CIDR’24), 2024.

   @inproceedings{lee2024cidr,
     author = {Lee, Sangjin and Lerner, Alberto and Bonnet, Philippe and Cudr\'e-Mauroux, Philippe},
     title = {Database Kernels: Seamless Integration of Database Systems and Fast Storage via {CXL}},
     booktitle = {14th Conference on Innovative Data Systems Research ({CIDR}'24)},
     year = {2024},
     url = {https://www.cidrdb.org/cidr2024/papers/p43-lee.pdf}
   }
   

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4. Jinwoo Jeong, Kibin Park, Sangjin Lee, Philippe Bonnet, Alberto Lerner, and Philippe Cudré-Mauroux. “Far-and-Near: Co-Designed Storage Reliability Between Database and SSDs.” In CIDR 2023, 13th Conference on Innovative Data Systems Research, 2023. Bibtex PDF

   Far-and-Near: Co-Designed Storage Reliability Between Database and SSDs

   Jinwoo Jeong, Kibin Park, Sangjin Lee, Philippe Bonnet, Alberto Lerner, and Philippe Cudré-Mauroux. “Far-and-Near: Co-Designed Storage Reliability Between Database and SSDs.” In CIDR 2023, 13th Conference on Innovative Data Systems Research, 2023.

   @inproceedings{jeong2023cidr,
     author = {Jeong, Jinwoo and Park, Kibin and Lee, Sangjin and Bonnet, Philippe and Lerner, Alberto and Cudr\'e-Mauroux, Philippe},
     title = {Far-and-Near: Co-Designed Storage Reliability Between Database and SSDs},
     booktitle = {{CIDR} 2023, 13th Conference on Innovative Data Systems Research},
     year = {2023},
     url = {https://exascale.info/assets/pdf/jeong2023cidr.pdf}
   }
   

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5. Sangjin Lee, Alberto Lerner, André Ryser, Kibin Park, Chanyoung Jeon, Jinsub Park, Yong Ho Song, and Philippe Cudré-Mauroux. “X-SSD: A Storage System with Native Support for Database Logging and Replication.” Proceedings of the 2022 International Conference on Management of Data (SIGMOD ’22). New York, NY, USA: Association for Computing Machinery, 2022. Bibtex PDF

   X-SSD: A Storage System with Native Support for Database Logging and Replication

   Sangjin Lee, Alberto Lerner, André Ryser, Kibin Park, Chanyoung Jeon, Jinsub Park, Yong Ho Song, and Philippe Cudré-Mauroux. “X-SSD: A Storage System with Native Support for Database Logging and Replication.” Proceedings of the 2022 International Conference on Management of Data (SIGMOD ’22). New York, NY, USA: Association for Computing Machinery, 2022.

   @inproceedgins{lee2022sigmod,
     author = {Lee, Sangjin and Lerner, Alberto and Ryser, Andr{\'e} and Park, Kibin and Jeon, Chanyoung and Park, Jinsub and Song, Yong Ho and Cudr{\'e}-Mauroux, Philippe},
     title = {{X-SSD}: A Storage System with Native Support for Database Logging and Replication},
     booktitle = {Proceedings of the 2022 International Conference on Management of Data (SIGMOD ’22)},
     year = {2022},
     url = {https://exascale.info/assets/pdf/lee2022sigmod.pdf},
     publisher = {Association for Computing Machinery},
     address = {New York, NY, USA},
     doi = {10.1145/3514221.3526188},
     isbn = {9781450392495},
     pages = {988–1002},
     numpages = {15}
   }
   

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6. Moonseok Jang, Kexin Wang, Sangjin Lee, Hyeonggyu Jeong, In-Yeong Song, Yong Ho Song, and Jungwook Choi. “Achieving Low Write Latency through New Stealth Program Operation Supporting Early Write Completion in NAND Flash Memory.” J. Syst. Archit. 133 (2022): 102767. Bibtex PDF

   Achieving low write latency through new stealth program operation supporting early write completion in NAND flash memory

   Moonseok Jang, Kexin Wang, Sangjin Lee, Hyeonggyu Jeong, In-Yeong Song, Yong Ho Song, and Jungwook Choi. “Achieving Low Write Latency through New Stealth Program Operation Supporting Early Write Completion in NAND Flash Memory.” J. Syst. Archit. 133 (2022): 102767.

   @article{DBLP:journals/jsa/JangWLJSSC22,
     author = {Jang, Moonseok and Wang, Kexin and Lee, Sangjin and Jeong, Hyeonggyu and Song, In{-}Yeong and Song, Yong Ho and Choi, Jungwook},
     title = {Achieving low write latency through new stealth program operation
                       supporting early write completion in {NAND} flash memory},
     journal = {J. Syst. Archit.},
     volume = {133},
     pages = {102767},
     year = {2022},
     url = {https://doi.org/10.1016/j.sysarc.2022.102767},
     doi = {10.1016/j.sysarc.2022.102767},
     timestamp = {Tue, 31 Jan 2023 20:45:01 +0100},
     biburl = {https://dblp.org/rec/journals/jsa/JangWLJSSC22.bib},
     bibsource = {dblp computer science bibliography, https://dblp.org}
   }
   

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7. Alberto Lerner, Jaewook Kwak, Sangjin Lee, Kibin Park, Yong Ho Song, and Philippe Cudré-Mauroux. “It Takes Two: Instrumenting the Interaction between In-Memory Databases and Solid-State Drives.” In CIDR 2020, 10th Conference on Innovative Data Systems Research, 2020. Bibtex PDF

   It Takes Two: Instrumenting the Interaction between In-Memory Databases and Solid-State Drives

   Alberto Lerner, Jaewook Kwak, Sangjin Lee, Kibin Park, Yong Ho Song, and Philippe Cudré-Mauroux. “It Takes Two: Instrumenting the Interaction between In-Memory Databases and Solid-State Drives.” In CIDR 2020, 10th Conference on Innovative Data Systems Research, 2020.

   @inproceedings{lerner2020cidr,
     author = {Lerner, Alberto and Kwak, Jaewook and Lee, Sangjin and Park, Kibin and Song, Yong Ho and Cudr{\'e}-Mauroux, Philippe},
     title = {It Takes Two: Instrumenting the Interaction between In-Memory Databases and Solid-State Drives},
     booktitle = {{CIDR} 2020, 10th Conference on Innovative Data Systems Research},
     year = {2020},
     url = {https://exascale.info/assets/pdf/lerner20cidr.pdf}
   }
   

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8. Youngil Kim, Jinwoo Jeong, Wang Kexin, Yong Ho Song, Seungdo Choi, Daeyong Lee, Joonyong Jeong, et al. “Low-Overhead Compressibility Prediction for High-Performance Lossless Data Compression.” IEEE Access 8 (2020): 37105–23. Bibtex PDF

   Low-Overhead Compressibility Prediction for High-Performance Lossless Data Compression

   Youngil Kim, Jinwoo Jeong, Wang Kexin, Yong Ho Song, Seungdo Choi, Daeyong Lee, Joonyong Jeong, et al. “Low-Overhead Compressibility Prediction for High-Performance Lossless Data Compression.” IEEE Access 8 (2020): 37105–23.

   @article{DBLP:journals/access/KimJKSCLJKLLLP20,
     author = {Kim, Youngil and Jeong, Jinwoo and Kexin, Wang and Song, Yong Ho and Choi, Seungdo and Lee, Daeyong and Jeong, Joonyong and Kwak, Jaewook and Lee, Jungkeol and Lee, Gyeongyong and Lee, Sangjin and Park, Kibin},
     title = {Low-Overhead Compressibility Prediction for High-Performance Lossless
                       Data Compression},
     journal = {{IEEE} Access},
     volume = {8},
     pages = {37105--37123},
     year = {2020},
     url = {https://doi.org/10.1109/ACCESS.2020.2975929},
     doi = {10.1109/ACCESS.2020.2975929},
     timestamp = {Mon, 19 Dec 2022 08:33:10 +0100},
     biburl = {https://dblp.org/rec/journals/access/KimJKSCLJKLLLP20.bib},
     bibsource = {dblp computer science bibliography, https://dblp.org}
   }
   

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9. Jaewook Kwak, Sangjin Lee, Kibin Park, Jinwoo Jeong, and Yong Ho Song. “Cosmos+ OpenSSD: Rapid Prototype for Flash Storage Systems.” ACM Trans. Storage 16, no. 3 (2020): 15:1–15:35. Bibtex PDF

   Cosmos+ OpenSSD: Rapid Prototype for Flash Storage Systems

   Jaewook Kwak, Sangjin Lee, Kibin Park, Jinwoo Jeong, and Yong Ho Song. “Cosmos+ OpenSSD: Rapid Prototype for Flash Storage Systems.” ACM Trans. Storage 16, no. 3 (2020): 15:1–15:35.

   @article{DBLP:journals/tos/KwakLPJS20,
     author = {Kwak, Jaewook and Lee, Sangjin and Park, Kibin and Jeong, Jinwoo and Song, Yong Ho},
     title = {Cosmos+ OpenSSD: Rapid Prototype for Flash Storage Systems},
     journal = {{ACM} Trans. Storage},
     volume = {16},
     number = {3},
     pages = {15:1--15:35},
     year = {2020},
     url = {https://doi.org/10.1145/3385073},
     doi = {10.1145/3385073},
     timestamp = {Mon, 19 Dec 2022 08:33:15 +0100},
     biburl = {https://dblp.org/rec/journals/tos/KwakLPJS20.bib},
     bibsource = {dblp computer science bibliography, https://dblp.org}
   }
   

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10. Alberto Lerner, Rana Hussein, André Ryser, Sangjin Lee, and Philippe Cudré-Mauroux. “Networking and Storage: The Next Computing Elements in Exascale Systems?.” IEEE Data Engineering Bulletin 43, no. 1 (March 2020): 60–71. Bibtex PDF

    Networking and Storage: The Next Computing Elements in Exascale Systems?

    Alberto Lerner, Rana Hussein, André Ryser, Sangjin Lee, and Philippe Cudré-Mauroux. “Networking and Storage: The Next Computing Elements in Exascale Systems?.” IEEE Data Engineering Bulletin 43, no. 1 (March 2020): 60–71.

    @article{lerner20debull,
      author = {Lerner, Alberto and Hussein, Rana and Ryser, Andr{\'e} and Lee, Sangjin and Cudr{\'e}-Mauroux, Philippe},
      title = {Networking and Storage: The Next Computing Elements in Exascale Systems?},
      journal = {{IEEE} Data Engineering Bulletin},
      issue_date = {March 2020},
      volume = {43},
      number = {1},
      month = mar,
      year = {2020},
      pages = {60--71},
      url = {https://exascale.info/assets/pdf/lerner20debull.pdf}
    }
    

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11. Seungdo Choi, Youngil Kim, Daeyong Lee, Sangjin Lee, Kibin Park, Yun Heub Song, and Yong Ho Song. “Design of FPGA-Based LZ77 Compressor With Runtime Configurable Compression Ratio and Throughput.” IEEE Access 7 (2019): 149583–94. Bibtex PDF

    Design of FPGA-Based LZ77 Compressor With Runtime Configurable Compression Ratio and Throughput

    Seungdo Choi, Youngil Kim, Daeyong Lee, Sangjin Lee, Kibin Park, Yun Heub Song, and Yong Ho Song. “Design of FPGA-Based LZ77 Compressor With Runtime Configurable Compression Ratio and Throughput.” IEEE Access 7 (2019): 149583–94.

    @article{DBLP:journals/access/ChoiKLLPSS19,
      author = {Choi, Seungdo and Kim, Youngil and Lee, Daeyong and Lee, Sangjin and Park, Kibin and Song, Yun Heub and Song, Yong Ho},
      title = {Design of FPGA-Based {LZ77} Compressor With Runtime Configurable Compression
                        Ratio and Throughput},
      journal = {{IEEE} Access},
      volume = {7},
      pages = {149583--149594},
      year = {2019},
      url = {https://doi.org/10.1109/ACCESS.2019.2947273},
      doi = {10.1109/ACCESS.2019.2947273},
      timestamp = {Sat, 17 Dec 2022 01:15:26 +0100},
      biburl = {https://dblp.org/rec/journals/access/ChoiKLLPSS19.bib},
      bibsource = {dblp computer science bibliography, https://dblp.org}
    }
    

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12. Sangjin Lee, and Yong Ho Song. “Experimental Results of Implementing NVMe-Based Open Channel SSDs.” Flash Memory Summit, 2017. Bibtex PDF

    Experimental Results of Implementing NVMe-based Open Channel SSDs

    Sangjin Lee, and Yong Ho Song. “Experimental Results of Implementing NVMe-Based Open Channel SSDs.” Flash Memory Summit, 2017.

    @article{lee2017experimental,
      title = {Experimental Results of Implementing NVMe-based Open Channel SSDs},
      author = {Lee, Sangjin and Song, Yong Ho},
      journal = {Flash Memory Summit},
      year = {2017},
      url = {https://www.flashmemorysummit.com/English/Collaterals/Proceedings/2017/20170809_S202D_Song.pdf}
    }
    

    ×