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Front. Inform. Technol. Electron. Eng.  2016, Vol. 17 Issue (2): 110-121    DOI: 10.1631/FITEE.1500216
    
VirtMan: iVCE环境下同构虚拟机大规模部署系统的设计与实现
Zi-yang Li, Yi-ming Zhang, Dong-sheng Li, Peng-fei Zhang, Xi-cheng Lu
National Laboratory for Parallel and Distributed Processing, School of Computer, National University of Defense Technology, Changsha 410073, China
VirtMan: design and implementation of a fast booting system for homogeneous virtual machines in iVCE
Zi-yang Li, Yi-ming Zhang, Dong-sheng Li, Peng-fei Zhang, Xi-cheng Lu
National Laboratory for Parallel and Distributed Processing, School of Computer, National University of Defense Technology, Changsha 410073, China
 全文: PDF 
摘要： 目的：在互联网环境下聚合数据中心中计算资源的虚拟计算环境（iVCE）可以提供经济而有效的服务。在iVCE中，我们广泛地应用虚拟机技术以实现用户间的隔离，保证计算环境的可信性。但是传统的虚拟机需要很长时间来启动，难以满足iVCE环境下大规模高动态的应用需求。针对这一问题，我们设计并实现了VirtMan，一个可以快速启动大量同构虚拟机的系统。
创新点：设计并实现了支持虚拟机镜像动态挂载的缓存组管理系统，可以实现动态地添加和删除缓存设备，减小从存储服务器上读取的数据量；设计并实现了支持虚拟机镜像数据快速分发的层级挂载技术，每个计算节点的本地缓存数据都可以提供给其他节点上的同构虚拟机，进一步减小存储服务器成为性能瓶颈的可能。
方法：VirtMan将远程的镜像块设备挂载到计算节点本地。在我们缓存组管理系统中为其新建一个缓存设备，并在缓存设备上为每个虚拟机建立快照，随后在快照设备上启动虚拟机。由于快照保证了缓存是只读的，我们将每个缓存设备作为新的挂载点，为其他节点上的同构虚拟机提供镜像数据。
结论：VirtMan通过弹性缓存组管理系统以及层级挂载等技术，极大地提高了大规模同构虚拟机的部署速度，可以实现在2分钟内部署1000台虚拟机。
关键词： 虚拟机;  快速启动;  同构性;  基于互联网的虚拟计算环境（iVCE）    
Abstract: Internet-based virtual computing environment (iVCE) has been proposed to combine data centers and other kinds of computing resources on the Internet to provide efficient and economical services. Virtual machines (VMs) have been widely used in iVCE to isolate different users/jobs and ensure trustworthiness, but traditionally VMs require a long period of time for booting, which cannot meet the requirement of iVCE’s large-scale and highly dynamic applications. To address this problem, in this paper we design and implement VirtMan, a fast booting system for a large number of virtual machines in iVCE. VirtMan uses the Linux Small Computer System Interface (SCSI) target to remotely mount to the source image in a scalable hierarchy, and leverages the homogeneity of a set of VMs to transfer only necessary image data at runtime. We have implemented VirtMan both as a standalone system and for OpenStack. In our 100-server testbed, VirtMan boots up 1000 VMs (with a 15 GB image of Windows Server 2008) on 100 physical servers in less than 120 s, which is three orders of magnitude lower than current public clouds.
Key words: Virtual machine    Fast booting    Homogeneity    Internet-based virtual computing environment (iVCE)
收稿日期: 2015-07-08 出版日期: 2016-02-02
CLC:  TP399  
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Zi-yang Li
Yi-ming Zhang
Dong-sheng Li
Peng-fei Zhang
Xi-cheng Lu

引用本文:

Zi-yang Li, Yi-ming Zhang, Dong-sheng Li, Peng-fei Zhang, Xi-cheng Lu. VirtMan: design and implementation of a fast booting system for homogeneous virtual machines in iVCE. Front. Inform. Technol. Electron. Eng., 2016, 17(2): 110-121.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/FITEE.1500216    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2016/V17/I2/110

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