Oze: Decentralized Graph-based Concurrency Control for Long-running Update Transactions
Summary: Oze uses a decentralized multi-version serialization graph to explore a large scheduling space and cut false positives, enabling long-running update transactions to coexist with short conflicting OLTP operations. Decentralized MVSG across cores yields up to 10^4× higher throughput on the BoMB benchmark versus optimistic/MV protocols and competitive TPC-C performance via protocol switching. (summarized by gpt-5-mini on Feb 09 2026)
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Authors
- 1. Jun Nemoto (Scalar, Inc.)
- 2. Takashi Kambayashi (Nautilus Technologies, Inc.)
- 3. Takashi Hoshino (Cybozu Labs, Inc.)
- 4. Hideyuki Kawashima (Keio University)
BibTeX Citation
@article{nemoto_vldb25,
title = {{Oze: Decentralized Graph-based Concurrency Control for Long-running Update Transactions}},
author = {Nemoto, Jun and Kambayashi, Takashi and Hoshino, Takashi and Kawashima, Hideyuki},
journal = {PVLDB},
series = {{VLDB} '25},
volume = {18},
number = {8},
pages = {2321--2333},
doi = {10.14778/3742728.3742730},
url = {https://doi.org/10.14778/3742728.3742730},
year = {2025}
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