Lethe: A Tunable Delete-Aware LSM Engine
Summary: Lethe introduces a delete-aware LSM engine with a compact metadata footprint and a data layout that interleaves sort and delete keys. It supports tunable tombstone propagation, range deletes on a secondary delete key, yielding higher read throughput and lower space amplification at modest write cost. (summarized by gpt-5-nano on Feb 09 2026)
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Authors
- 1. Subhadeep Sarkar (Boston University)
- 2. Tarikul Islam Papon (Boston University)
- 3. Dimitris Staratzis (Boston University)
- 4. Manos Athanassoulis (Boston University)
BibTeX Citation
@inproceedings{sarkar_sigmod20,
title = {{Lethe: A Tunable Delete-Aware LSM Engine}},
author = {Sarkar, Subhadeep and Papon, Tarikul Islam and Staratzis, Dimitris and Athanassoulis, Manos},
series = {{SIGMOD} '20},
booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
publisher = {Association for Computing Machinery},
doi = {10.1145/3318464.3389757},
url = {https://dl.acm.org/doi/10.1145/3318464.3389757},
year = {2020}
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