Automated Control of Aggressive Prefetching for HTTP Streaming Video Servers
Jim Summers, Tim B. Brecht, Derek L. Eager, Tyler Szepesi, Benjamin Cassell, Bernard Wong · 2014
Past work has shown that disk prefetching can be an effective technique for improving the performance of disk bound workloads. However, the performance gains are highly dependent on selecting a prefetch size that is appropriate for a specific system and workload. Using a prefetch size that is too small can lead to poor overall disk throughput, whereas prefetch sizes that are too large can lead to data being evicted before it can be used by a subsequent request.