Soft-TTL：时变分数缓存
Soft-TTL: Time-Varying Fractional Caching
摘要：
标准生存时间（TTL）缓存管理规定在请求后的给定时间内存储整个文件或其中的一部分。作为这种方法的推广，这项工作提出了一个随时间变化的存储，减少，所请求的文件的一部分。因此，高速缓存在请求之后的一段时间间隔内逐渐地驱逐文件的部分。该策略，这是被称为软TTL，是合理的事实，即流量跟踪的特点往往是由到达过程，显示一个减少，但不可忽略的，观察一个请求的时间流逝，因为最后一个请求增加的概率。软TTL的优化为基础的分析，演示了重要的作用，发挥的危险函数的到达间隔请求过程中，它的措施的可能性，观察一个请求的函数的时间，因为最近的请求。
英文摘要：
Standard Time-to-Live (TTL) cache management prescribes the storage of entire files, or possibly fractions thereof, for a given amount of time after a request. As a generalization of this approach, this work proposes the storage of a time-varying, diminishing, fraction of a requested file. Accordingly, the cache progressively evicts parts of the file over an interval of time following a request. The strategy, which is referred to as soft-TTL, is justified by the fact that traffic traces are often characterized by arrival processes that display a decreasing, but non-negligible, probability of observing a request as the time elapsed since the last request increases. An optimization-based analysis of soft-TTL is presented, demonstrating the important role played by the hazard function of the inter-arrival request process, which measures the likelihood of observing a request as a function of the time since the most recent request.
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