...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Performability Engineering >Improved Post-Copy Live Migration with Memory Page Prefetching
【24h】

Improved Post-Copy Live Migration with Memory Page Prefetching

机译：通过内存页面预取改进复制后的实时迁移

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

IaaS cloud computing data centers always employ live migration of virtual machines (VM) to achieve dynamic scheduling and management of IT resources. Pre-copy and Post-copy are two prevalent live migration algorithms. Both have pros and cons, and they work well only in suitable scenarios. Contrary to Pre-copy, Post-copy performs better with memory writing workloads running in VM to be migrated. Post-copy switches the VM to the target host immediately once the live migration is launched, and then it requests the source host to transfer memory pages whenever the VM accesses a nonexistent page. Although this Post-copy scheme can guarantee that every memory page needs to copy only once and the migration time is predictable, it can cause a mass of network requests for fault pages, which can lead to a prolonged downtime for VM and a degraded live migration performance. This paper proposes an improved Post-copy scheme with memory page prefetching, which leverages PPM (Prediction by Partial Match) to build a prediction model for memory page accessing and predict the pages to be read soon. Once a network page fault happens, this model determines the following pages to be accessed. Then, this faulted page together with these predicted pages are sent to the target host to avoid subsequent page faults. Experiment results show that this proposed scheme can allow for accurate page prediction and prominently decrease the network page faults and downtime for VM.
机译：IAAS云计算数据中心始终采用虚拟机（VM）的实时迁移来实现IT资源的动态调度和管理。副本和后拷贝是两个普遍的实时迁移算法。两者都有利弊，他们只能在适当的情况下工作。与预拷贝相反，后拷贝更好地使用在要迁移的VM中运行的内存编写工作负载更好。后拷贝后立即将VM切换到目标主机一旦启动实时迁移，然后它请求源主机在VM访问不存在的页面时传输内存页面。虽然这一后拷贝的方案可以保证只需要只需要一次复制一次并且迁移时间可预测，但它可能导致大量的故障页面请求，这可能导致VM和劣化的实时迁移的延长停机表现。本文提出了一种改进的复制后方案，内存页面预取，它利用PPM（通过部分匹配预测）来构建存储页面的预测模型，并预测要读取的页面即将读取。一旦网络页面发生故障，此模型将确定要访问的以下页面。然后，将该故障页面与这些预测页面一起发送到目标主机以避免后续页面错误。实验结果表明，该提出的方案可以允许准确的页面预测，并突出地减少VM的网络页面故障和停机时间。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号