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- W4384705462 abstract "Learned admission policies have shown promise in improving Content Delivery Network (CDN) cache performance and lowering operational costs. Unfortunately, existing learned policies are optimized with a few fixed cache sizes while in reality, cache sizes often vary over time in an unpredictable manner. As a result, existing solutions cannot provide consistent benefits in production settings.We present SLAP, a learned CDN cache admission approach based on segmented object reuse time prediction. SLAP predicts an object’s reuse time range using the Long-Short-Term-Memory model and admits objects that will be reused (before eviction) given the current cache size. SLAP separates model training from cache size, allowing it to adapt to arbitrary sizes. The key to our solution is a novel segmented labeling scheme that enables SLAP to precisely predict object reuse time. To further make SLAP a practical and efficient solution, we propose aggressive reusing of computation and training on sampled traces to optimize model training, and a specialized predictor architecture that overlaps prediction computation with miss object fetching to optimize model inference. Our experiments with production CDN traces show that SLAP achieves significantly lower write traffic (38%-59%), longer SSDs service life (104%-178%), a consistently higher hit rate (3.2%-11.7%), and requires no effort to adapt to changing cache sizes, outperforming existing policies." @default.
- W4384705462 created "2023-07-20" @default.
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- W4384705462 date "2023-05-01" @default.
- W4384705462 modified "2023-10-17" @default.
- W4384705462 title "SLAP: An Adaptive, Learned Admission Policy for Content Delivery Network Caching" @default.
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- W4384705462 doi "https://doi.org/10.1109/ipdps54959.2023.00053" @default.
- W4384705462 hasPublicationYear "2023" @default.
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