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Zhenyu Song

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  • NSDI2 editions2020–2023

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Adaptive Online Cache Capacity Optimization via Lightweight Working Set Size...USENIX ATC '232023-07-10
Cuki is a tiny, thread-safe cuckoo-style sketch that estimates working set size and item-repetition ratio online for variable-size objects, with provable error…
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HALP: Heuristic Aided Learned Preference Eviction Policy for YouTube Content Delivery...NSDI 20232023-04-17
HALP runs as YouTube’s DRAM eviction layer since early 2022 and claims a 9.1% average reduction in P95 byte-miss during peak with ~1.8% CPU overhead. It…
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Learning Relaxed Belady for Content Distribution Network CachingNSDI 20202020-02-25
A machine‑learned cache replacement called Relaxed Belady approximates Belady’s MIN by treating all items beyond a chosen time boundary equally and evicting a…
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