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首页> 外文期刊>Journal of network and computer applications >Resource discovery and request-redirection for dynamic load sharing in multi-provider peering content delivery networks
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Resource discovery and request-redirection for dynamic load sharing in multi-provider peering content delivery networks

机译：多供应商对等内容交付网络中用于动态负载共享的资源发现和请求重定向

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摘要

A constellation of Content Delivery Networks (CDNs), termed as peering CDNs, endeavors to guarantee adequate delivery performance when the incoming request load is overwhelming for a single provider alone. Each user is served by an optimal Web server in terms of network cost, even under heavy load conditions. Before it could be comprehended, appropriate resource discovery and request-redirection mechanisms, coupled with an optimal server selection strategy, should be in place to perform the distribution of highly skewed loads, in this paper, we devise an effective load distribution strategy by adopting distributed resource discovery and dynamic request-redirection mechanisms, taking traffic load and network proximity into account. The load distribution strategy reacts to overload conditions, at a time instance, in any primary CDN server(s) and instantly distributes loads to the target servers, minimizing network cost and observing practical constraints. In this context, we exercise an asynchronous resource discovery protocol, reminiscent of the public/subscribe notion, and formulate the resulting redirection scheme. Extensive simulation analyses demonstrate the novelty of our approach. In particular, we show that our approach is effective to handle high load skews by preserving locality, and thus achieve service "responsiveness". We also perform a sensitivity analysis to reveal that our redirection scheme outperforms other alternatives to handle peak loads.
机译：内容分发网络（CDN）集群称为对等CDN，它会努力在仅单个提供商的传入请求负载不堪重负的情况下保证足够的交付性能。就网络成本而言，即使在重负载条件下，每个用户都可以通过最佳的Web服务器获得服务。在理解之前，应该建立适当的资源发现和请求重定向机制，再加上最佳的服务器选择策略，以执行高度偏斜的负载分配。在本文中，我们通过采用分布式设计了一种有效的负载分配策略。资源发现和动态请求重定向机制，同时考虑流量负载和网络邻近性。负载分配策略有时会在任何主CDN服务器中对过载情况做出反应，并立即将负载分配到目标服务器，从而将网络成本降至最低并遵守实际限制。在这种情况下，我们将使用一种异步资源发现协议，以回想公共/订阅的概念，并制定最终的重定向方案。大量的仿真分析证明了我们方法的新颖性。特别是，我们证明了我们的方法通过保留局部性可以有效地处理高负载偏斜，从而实现服务的“响应能力”。我们还进行了敏感性分析，以表明我们的重定向方案在处理峰值负载方面优于其他替代方案。

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