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Triple-L: Improving CPS Disk I/O Performance in a Virtualized NAS Environment

机译：Triple-L：在虚拟NAS环境中提高CPS磁盘I / O性能

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摘要

Network-attached storage (NAS) provides cyberphysical systems (CPS) with the scalable, efficient, and reliable backing storage, such as the mobile virtual desktop based on cloud infrastructure. Within this storage architecture, virtual machine (VM) instances running in the NAS client usually receive data from the complex physical world and then persist them in the neat cyberspace in the NAS server. In this paper, we propose Triple-L to improve VM disk I/O performance in the NAS architecture. According to the specific storage semantic, Triple-L decouples the VM image file into several subfiles at the host layer and then selectively moves them into the NAS clients. In such a way, a VM disk I/O request may be proceeded locally in the NAS client, instead of walking the external networking path repetitively between NAS server and client. We have implemented Triple-L in a Xen-based NAS system. An accessory solution for dealing with storage failure and VM live migration on Triple-L is also discussed and evaluated. The experimental result shows that our work can effectively improve the disk I/O performance of VMs. Meanwhile, it brings moderate overhead for VM live migration.
机译：网络附加存储（NAS）为网络物理系统（CPS）提供了可扩展，高效且可靠的后备存储，例如基于云基础架构的移动虚拟桌面。在这种存储体系结构中，运行在NAS客户端中的虚拟机（VM）实例通常从复杂的物理世界中接收数据，然后将其持久存储在NAS服务器中的整洁网络空间中。在本文中，我们提出了Triple-L来提高NAS架构中VM磁盘I / O性能。根据特定的存储语义，Triple-L在主机层将VM映像文件解耦为几个子文件，然后有选择地将它们移至NAS客户端。这样，可以在NAS客户端中本地处理VM磁盘I / O请求，而不是在NAS服务器和客户端之间重复遍历外部网络路径。我们已经在基于Xen的NAS系统中实现了Triple-L。还讨论并评估了用于处理Triple-L上的存储故障和VM实时迁移的辅助解决方案。实验结果表明，我们的工作可以有效地提高虚拟机的磁盘I / O性能。同时，它为VM实时迁移带来了适度的开销。

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  • 来源
    《IEEE systems journal》 |2017年第1期|152-162|共11页
  • 作者

    Dingding Li; Mianxiong Dong; Yong Tang; Laurence T. Yang; Kaoru Ota; Gansen Zhao;

  • 作者单位

    School of Computer Science, South China Normal University, Guangzhou, China;

    Department of Information and Electronic Engineering, Muroran Institute of Technology, Muroran, Japan;

    School of Computer Science, South China Normal University, Guangzhou, China;

    Department of Computer Science, St. Francis Xavier University, Antigonish, NS, Canada;

    Department of Information and Electronic Engineering, Muroran Institute of Technology, Muroran, Japan;

    School of Computer Science, South China Normal University, Guangzhou, China;

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  • 正文语种 eng
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  • 关键词

    Servers; Cloud computing; Protocols; Cyberspace; Switches; Mobile communication; Reliability;

    机译：服务器;云计算;协议;网络空间;交换机;移动通信;可靠性;

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