K2: On Optimizing Distributed Transactions in a Multi-region Data Store with TrueTime Clocks
Summary: K2 co-designs TrueTime and multi-region transactions with scalable timestamp generation, MV timestamp-ordering, and TTC-based replica visibility. It delivers 10× higher throughput than geo-distributed protocols while reducing asynchronous-replica visibility delay. (summarized by gpt-5.6-luna on Jul 24 2026)
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Authors
- 1. Haoze Song (University of Hong Kong)
- 2. Yongqi Wang (Shanghai Jiao Tong University)
- 3. Xusheng Chen (Huawei)
- 4. Hao Feng (Huawei)
- 5. Yazhi Feng (Huawei)
- 6. Xieyun Fang (Huawei)
- 7. Heming Cui (Shanghai AI Laboratory; University of Hong Kong)
- 8. Linghe Kong (Shanghai Jiao Tong University)
BibTeX Citation
@article{song_vldb25,
title = {{K2: On Optimizing Distributed Transactions in a Multi-region Data Store with TrueTime Clocks}},
author = {Song, Haoze and Wang, Yongqi and Chen, Xusheng and Feng, Hao and Feng, Yazhi and Fang, Xieyun and Cui, Heming and Kong, Linghe},
journal = {PVLDB},
series = {{VLDB} '25},
volume = {18},
number = {6},
pages = {1756--1769},
doi = {10.14778/3725688.3725704},
url = {https://doi.org/10.14778/3725688.3725704},
year = {2025}
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