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On demand clock synchronization for live VM migration in distributed cloud data centers

机译:在分布式云数据中心的Live VM迁移的需求时钟同步

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Live migration of virtual machines (VMs) has become an extremely powerful tool for cloud data center management and provides significant benefits of seamless VM mobility among physical hosts within a data center or across multiple data centers without interrupting the running service. However, with all the enhanced techniques that ensure a smooth and flexible migration, the down-time of any VM during a live migration could still be in a range of few milliseconds to seconds. But many time-sensitive applications and services cannot afford this extended down-time, and their clocks must be perfectly synchronized to ensure no loss of events or information. In such a virtualized environment, clock synchronization with minute precision and error boundedness are one of the most complex and tedious tasks for system performance. In this paper, we propose enhanced DTP and wireless FTP based clock synchronization algorithms to achieve high precision at intra and inter-cloud data center networks. We thoroughly analyze the performance of the proposed algorithms using different clock measurements. Through simulation and real-time experiments, we also show the effect of various performance parameters on the data center networking architectures.
机译:虚拟机(VMS)的实时迁移已成为云数据中心管理的极其强大的工具,在数据中心内的物理主机之间或在不中断运行服务的情况下提供了无缝VM移动性的显着优势。然而,通过所有增强的技术,可以确保平滑且灵活的迁移,在实时迁移期间的任何VM的下降仍然可以在几毫秒的范围内。但是许多时间敏感的应用和服务不能承担这一扩展的停机时间,并且它们的时钟必须完全同步,以确保不会丢失事件或信息。在这样的虚拟化环境中,与微小精度和误差界限的时钟同步是系统性能最复杂和最繁琐的任务之一。在本文中,我们提出了增强的DTP和基于无线FTP的时钟同步算法,在云内和云间数据中心网络中实现了高精度。我们通过不同的时钟测量彻底分析了所提出的算法的性能。通过模拟和实时实验,我们还显示了各种性能参数对数据中心网络架构的影响。

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