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Access-Time Aware Cache Algorithms

机译:访问时间感知缓存算法

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Most of the caching algorithms are oblivious to requests' timescale, but caching systems are capacity constrained and, in practical cases, the hit rate may be limited by the cache's impossibility to serve requests fast enough. In particular, the hard-disk access time can be the key factor capping cache performances. In this paper, we present a new cache replacement policy that takes advantage of a hierarchical caching architecture, and in particular of access-time difference between memory and disk. Our policy is optimal when requests follow the independent reference model, and significantly reduces the hard-disk load, as shown also by our realistic, trace-driven evaluation.
机译:大多数缓存算法都忽略了请求的时间范围,但是缓存系统受容量限制,在实际情况下,命中率可能会受到缓存无法足够快地为请求提供服务的限制。特别是,硬盘访问时间可能是限制缓存性能的关键因素。在本文中,我们提出了一种新的缓存替换策略,该策略利用了分层缓存体系结构,尤其是内存和磁盘之间的访问时间差。当请求遵循独立的参考模型时,我们的策略是最佳选择,并且可以显着减少硬盘负载,正如我们现实的,跟踪驱动的评估所表明的那样。

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