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arXiv 1707.09757cs.ITcs.DScs.NImath.IT
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Cache网络中的编码负载均衡

Coded Load Balancing in Cache Networks

Mahdi Jafari Siavoshani, Farzad Parvaresh, Ali Pourmiri, Seyed Pooya Shariatpanahi

摘要:

我们考虑负载均衡问题的缓存网络组成的存储功能的服务器形成一个分布式的内容交付方案。以前提出的负载均衡解决方案不能完美地平衡服务器之间的请求,这是实际网络中的一个关键问题。因此,在本文中,我们研究了一个编码的缓存内容放置原始文件的编码块存储在服务器上的文件流行度分布的基础上。在我们的方案中,当每个请求到达交付阶段时,通过从最近的服务器向请求源发送足够的编码块,可以解码所请求的文件。在这里,我们表明,如果$n$请求随机到达$n$服务器,所提出的方案的结果在网络中的最大负载$O(1)$。这个结果被证明是有效的基础网络拓扑结构的各种假设下。我们的结果应该比较的最大负载的两个基线计划,即最近的副本和权力的两个选择策略,这是$Θ(\log n)$和$Θ(\log \log n)$,分别。这一发现表明,使用编码,在相当大的负载均衡性能的改善,而不损害通信成本性能。这是证实了执行广泛的模拟结果,在非渐近制度以及。

英文摘要:

We consider load balancing problem in a cache network consisting of storage-enabled servers forming a distributed content delivery scenario. Previously proposed load balancing solutions cannot perfectly balance out requests among servers, which is a critical issue in practical networks. Therefore, in this paper, we investigate a coded cache content placement where coded chunks of original files are stored in servers based on the files popularity distribution. In our scheme, upon each request arrival at the delivery phase, by dispatching enough coded chunks to the request origin from the nearest servers, the requested file can be decoded. Here, we show that if $n$ requests arrive randomly at $n$ servers, the proposed scheme results in the maximum load of $O(1)$ in the network. This result is shown to be valid under various assumptions for the underlying network topology. Our results should be compared to the maximum load of two baseline schemes, namely, nearest replica and power of two choices strategies, which are $Θ(\log n)$ and $Θ(\log \log n)$, respectively. This finding shows that using coding, results in a considerable load balancing performance improvement, without compromising communications cost performance. This is confirmed by performing extensive simulation results, in non-asymptotic regimes as well.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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