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K.V. Rashmi

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Okapi: Decoupling Data Striping and Redundancy Grouping in Cluster File SystemsOSDI '252025-07-07
Okapi decouples stripes and redundancy groups, letting stripe width be tuned for IO patterns while group width is tuned for reliability and cost; prototype…
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SIEVE is Simpler than LRU: an Efficient Turn-Key Eviction Algorithm for Web Caches21st USENIX Symposium on Networked Systems Design and Implementation (NSDI '24)2024-04-16
SIEVE is an eviction algorithm that uses a moving “S” hand to give lazy promotion and quick demotion, keeping hits lock-free so cache hits require no locking…
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Tambur: Efficient loss recovery for videoconferencing via streaming codesNSDI 20232023-04-17
Tambur applies streaming codes tuned to videoconferencing, evaluated on Microsoft Teams traces and in emulated end-to-end calls after being implemented in C++…
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GL-Cache: Group-level learning for efficient and high-performance cachingFAST '23: 21st USENIX Conference on File and Storage Technologies2023-02-21
Groups objects by insertion-time grouping and trains a model on group snapshots (seven features, using gradient-boosted trees) so inference and state are…
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C2DN: How to Harness Erasure Codes at the Edge for Efficient Content Delivery19th USENIX Symposium on Networked Systems Design and Implementation (NSDI '22)2022-04-04
Analyzes month-long logs from over 2000 clusters and implements C2DN on Apache Traffic Server, replacing replication with erasure coding plus targeted parity…
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Cluster storage systems gotta have HeART...FAST '192019-02-25
An online tool called HeART monitors per–make/model annualized failure rates, uses an anomaly detector (robust random cut forest) and a change-point detector…
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