8 papers
SCION: Size-aware Policy Orchestration for Nonstationary Object Caches (Long Paper Version)
Qizhi Wang
Object caches underpin cloud and edge services, but production workloads are heterogeneous, nonstationary, and throughput-constrained. Recent simple non-ML policies such as SIEVE a…
A Practical Framework for Flaky Failure Triage in Distributed Database Continuous Integration
Jun-Peng Zhu, Qizhi Wang, Yulong Zhai +8
Flaky failure triage is crucial for keeping distributed database continuous integration (CI) efficient and reliable. After a failure is observed, operators must quickly decide whet…
GLEAN: Grounded Lightweight Evaluation Anchors for Contamination-Aware Tabular Reasoning
Qizhi Wang
Tabular reasoning benchmarks mix semantic inference, numerical computation, and brittle table formatting, yet evaluations for small models remain vulnerable to contamination, datas…
Democratizing GraphRAG: Linear, CPU-Only Graph Retrieval for Multi-Hop QA
Qizhi Wang
GraphRAG systems improve multi-hop retrieval by modeling structure, but many approaches rely on expensive LLM-based graph construction and GPU-heavy inference. We present SPRIG (Se…
AMBIT: Augmenting Mobility Baselines with Interpretable Trees
Qizhi Wang
Origin-destination (OD) flow prediction remains a core task in GIS and urban analytics, yet practical deployments face two conflicting needs: high accuracy and clear interpretabili…
BALLAST: Bandit-Assisted Learning for Latency-Aware Stable Timeouts in Raft
Qizhi Wang
Randomized election timeouts are a simple and effective liveness heuristic for Raft, but they become brittle under long-tail latency, jitter, and partition recovery, where repeated…