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首页> 外文会议>2018 International Conference on Cloud Computing, Big Data and Blockchain >Live Migration Analysis for Multitasking Virtual Machines under Memory Stresses
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Live Migration Analysis for Multitasking Virtual Machines under Memory Stresses

机译：内存压力下多任务虚拟机的实时迁移分析

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摘要

Virtual machine live migration is an important mechanism that enables virtual machines to move from source hosts to their target hosts in seamless way. By the aid of live migration, energy saving and load balancing on cloud computing platforms can be easily achieved. However, a long service downtime at the stop-and-copy stage of live migration may violate the service level agreement cosigned by the providers and customers. The downtime can be reduced if the memory space available to tasks is shrunk before a migrating virtual machine enters the stop-and-copy stage. Those pages which are swapped out due to the shortage of available memory will be swapped in after the virtual machine has successfully resumed at the target host. Page-swapping degenerates the performance of a virtual machine because of resource underutilization. Multitasking can be used to compensate for the performance loss caused by intensive page swapping. In this paper, we analyse the performance of a multitasking virtual machine which migrates under memory stress. The performance metric is the time taken by a multitasking virtual machine to complete all the concurrent tasks which start at a host and finish at another. Our experimental results show that the performance of a multitasking virtual machine with live migration demand can be improved if tasks are executed concurrently under appropriate memory stress settings.
机译：虚拟机实时迁移是一种重要的机制，可使虚拟机以无缝方式从源主机移动到目标主机。通过实时迁移，可以轻松实现云计算平台上的节能和负载平衡。但是，在实时迁移的“停止复制”阶段，长时间的服务停机可能会违反提供商和客户共同签署的服务级别协议。如果在迁移的虚拟机进入停止和复制阶段之前缩小了任务可用的内存空间，则可以减少停机时间。虚拟机在目标主机上成功恢复后，由于可用内存不足而换出的页面将被换入。由于资源利用不足，页面交换会降低虚拟机的性能。多任务处理可用于补偿由于密集的页面交换而导致的性能损失。在本文中，我们分析了在内存压力下迁移的多任务虚拟机的性能。性能指标是多任务虚拟机完成在主机上启动并在另一台主机上完成的所有并发任务所花费的时间。我们的实验结果表明，如果在适当的内存压力设置下同时执行任务，则具有实时迁移需求的多任务虚拟机的性能可以得到改善。

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