计算机应用与软件Issue(8)：84-87,4.DOI:10.3969/j.issn.1000-386x.2015.08.020
云计算虚拟化环境下开源镜像对比分析
COMPARATIVE ANALYSIS ON OPEN SOURCE VM IMAGE UNDER CLOUD COMPUTING AND VIRTUALISATION ENVIRONMENT
摘要
Abstract
In cloud computing environment, open source VM images in formats of raw and qcow2 have been the mainstream of current application.Through experimental study, in this paper we make a detailed analysis on the functionality, network transmission and I/O performance of VM image formats.Experimental results show that qcow2 is conspicuously better than raw in terms of functionality and network transmission.In perspective of performance, the I/O performance of qcow2 is worse than that of raw owing to relatively simple addressing mode of raw.Experiments also show that when the I/O of file size exceeds half the memory of the VM, huge performance degradation appears on both VM image formats.Due to the influence of different caching mechanism, there is more serious impact on qcow2.关键词
云计算/虚拟化/开源镜像/对比分析Key words
Cloud computing/Virtualisation/Open source VM image/Comparative analysis分类
信息技术与安全科学引用本文复制引用
鲁志军,祖立军..云计算虚拟化环境下开源镜像对比分析[J].计算机应用与软件,2015,(8):84-87,4.基金项目
国家云计算示范工程项目（ C73623989020220110006）。 （）
