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We introduce a new method for discrete-decision-variable optimization via simulation that combines the stochastic branch-and-bound method and the nested partitions method in the sense that we take advantage of the partitioning structure of stochastic branch and bound, but estimate the bounds based on the performance of sampled solutions as the nested partitions method does. Our Empirical Stochastic...
This paper analyzed the performance characteristics of classic 2Q algorithm when it was performed on mail-service workloads, and proposes an improved algorithm, called 2Q*. The simulation results show that 2Q* algorithm can outperform the other replacement algorithms, including the classic 2Q algorithm, for all the cache sizes and various mail-service workloads. To verify the simulation results in...
P-Cache to provide prioritized caching service for storage server which is used to serve multiple concurrently accessing applications with diverse access patterns and unequal importance. Given the replacement algorithm and the application access patterns, the end performance of each individual application in a shared cache is actually determined by its allocated cache resource. So, P-Cache adopts...
With popularity of different kind of search engines on WWW, it requires the backend storage system to provide better physical I/O performance to speedup the query service perceived by end users. However, existing general purpose designed replacement algorithm canpsilat performs well for the web search applications. This paper first studies the access pattern of various real-life web search workload...
This paper presents a flexible two-layer buffer caching scheme to improve the performance of storage cache which is used to serve multiple concurrently accessing applications with diverse access patterns. To achieve this, the proposed scheme dynamically partitions the cache among applications. At the first layer, it uses a configurable global cache allocation policy to make adaptive cache allocations...
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