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Qi Chen

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titleconferencedate
Equal Opportunity: A Correctness Condition for Ordered Consensus20th USENIX Symposium on Operating Systems Design and Implementation (OSDI '26)2026-07-13
Defines a formal fairness condition called ordering equality (and a separation parameter delta) and shows randomness is necessary and sufficient to bound bias…
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VBASE: Unifying Online Vector Similarity Search and Relational Queries via Relaxed...OSDI 20232023-07-10
VBase identifies a property called relaxed monotonicity that lets approximate nearest-neighbor indices serve as termination checks for SQL-style queries…
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HadaFS: A File System Bridging the Local and Shared Burst Buffer for ExascaleFAST '23: 21st USENIX Conference on File and Storage Technologies2023-02-21
HadaFS is a deployed burst-buffer file system that bridges local and shared BBs by implementing a Localized Triage Architecture to bind clients to selected…
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AutoSys: The Design and Operation of Learning-Augmented SystemsUSENIX ATC '202020-07-15
AutoSys is a unified framework that runs Hyperband, TPE, SMAC tuners and trial benchmarks to auto-tune five Web Search engines (selection, ranking, KV stores)…
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