Computing segmented backups using Resilient Routing Layers

A.Vijay Kumar, A. Potluri, A. Negi
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引用次数: 1

Abstract

Hard guarantees on message delivery timeliness and recovery delay from network equipment failures are required by several distributed real-time applications such as video conferencing. In order to meet these requirements many schemes have been proposed to provide solutions by reserving additional resources a priori along a disjoint backup path. One of the approaches in the literature proposes segmented backup, in which backup paths are provided for partial segments of the primary path rather than for its entire length. The advantages of having segmented backups are improved network resource utilization and faster failure-recovery. We found that generates only two backup segments, whatever the length of the primary path, in mesh networks. This is not much better than a disjoint path in terms of resource utilization. We propose a new method for computing segmented backup using the concept of Resilient Routing Layers (RRL). We compared the performance of our scheme with the scheme proposed in for mesh and other topologies generated using BRITE. We demonstrate that our approach gives better results on parameters like number of backup segments, percentage reuse of primary path and average hop count for failure notification which influence network resource utilization and faster failure-recovery.
使用弹性路由层计算分段备份
视频会议等分布式实时应用需要对消息传递时效性和网络设备故障恢复延迟进行硬保证。为了满足这些要求,已经提出了许多方案,通过沿着不相交的备份路径先验地保留额外的资源来提供解决方案。文献中的一种方法提出分段备份,其中为主路径的部分段提供备份路径,而不是为其整个长度提供备份路径。分段备份的优点是提高了网络资源利用率和更快的故障恢复速度。我们发现,在网状网络中,无论主路径的长度如何,只产生两个备份段。就资源利用率而言,这并不比不相交路径好多少。提出了一种基于弹性路由层(RRL)的分段备份计算方法。对于使用BRITE生成的网格和其他拓扑,我们将该方案的性能与中提出的方案进行了比较。我们证明了我们的方法在诸如备份段数量、主路径重用百分比和故障通知的平均跳数等参数上给出了更好的结果,这些参数会影响网络资源利用率和更快的故障恢复。
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