FlexPushdownDB: Hybrid Pushdown and Caching in a Cloud DBMS
Summary: FlexPushdownDB enables a hybrid pushdown-cache model for storage-disaggregated cloud OLAP, merging cache and pushdown results via separable operators. Weighted-LFU policy accounts for pushdown cost, yielding 2.2x vs single-tech and 37% vs LFU on Star Schema. (summarized by gpt-5-nano on Feb 09 2026)
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Authors
- 1. Yifei Yang (University of Wisconsin)
- 2. Matt Youill (Burnian)
- 3. Matthew Woicik (Massachusetts Institute of Technology)
- 4. Yizhou Liu (University of Wisconsin)
- 5. Xiangyao Yu (University of Wisconsin)
- 6. Marco Serafini (University of Massachusetts-Amherst)
- 7. Ashraf Aboulnaga (Qatar Computing Research Institute)
- 8. Michael Stonebraker (Massachusetts Institute of Technology)
BibTeX Citation
@article{yang_vldb21,
title = {{FlexPushdownDB: Hybrid Pushdown and Caching in a Cloud DBMS}},
author = {Yang, Yifei and Youill, Matt and Woicik, Matthew and Liu, Yizhou and Yu, Xiangyao and Serafini, Marco and Aboulnaga, Ashraf and Stonebraker, Michael},
journal = {PVLDB},
series = {{VLDB} '21},
volume = {14},
number = {11},
pages = {2101--2113},
doi = {10.14778/3476249.3476265},
url = {https://doi.org/10.14778/3476249.3476265},
year = {2021}
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