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首页> 外文会议>2015 IEEE 17th International Conference on High Performance Computing and Communications, 2015 IEEE 7th International Symposium on Cyberspace Safety and Security, 2015 IEEE 12th International Conference on Embedded Software and Systems >Virtual Machine Image Content Aware I/O Optimization for Mobile Virtualization
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Virtual Machine Image Content Aware I/O Optimization for Mobile Virtualization

机译：用于移动虚拟化的虚拟机映像内容感知I / O优化

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摘要

Mobile virtualization introduces extra layers in software stacks, which leads to performance degradation. Especially, each I/O operation has to pass through several software layers to reach the NAND-flash-based storage systems. This paper targets at optimizing I/O for mobile virtualization, since I/O becomes one of major performance bottlenecks that seriously affects the performance of mobile devices. Among all the I/O operations, a large percentage is updating metadata. Frequent updating metadata not only degrades overall I/O performance but also severely reduces flash memory lifetime. In this paper, we propose a novel I/O optimization techniqueto identify the metadata of a guest file system which is storedin a VM (Virtual Machine) image file and frequently updated. Then, these metadata are stored in a small additional NVM(Non-Volatile Memory) which is faster and more endurableto greatly improve flash memory's performance and lifetime. To the best of our knowledge, this is the first work to identifythe file system metadata from regular data in a guest OS VMimage file under mobile virtualization. The proposed schemeis evaluated on a real hardware embedded platform. Theexperimental results show that the proposed techniques canimprove write performance to 45.21% in mobile devices withvirtualization.
机译：移动虚拟化在软件堆栈中引入了额外的层，从而导致性能下降。特别是，每个I / O操作都必须经过几个软件层才能到达基于NAND闪存的存储系统。由于I / O成为严重影响移动设备性能的主要性能瓶颈之一，因此本文旨在针对移动虚拟化优化I / O。在所有I / O操作中，很大一部分正在更新元数据。频繁更新元数据不仅会降低整体I / O性能，而且会严重缩短闪存的使用寿命。在本文中，我们提出了一种新颖的I / O优化技术，以识别存储在VM（虚拟机）映像文件中并经常更新的来宾文件系统的元数据。然后，将这些元数据存储在较小的附加NVM（非易失性存储器）中，该NVM更快，更持久，可大大提高闪存的性能和使用寿命。据我们所知，这是在移动虚拟化条件下从来宾OS VMimage文件中的常规数据识别文件系统元数据的第一项工作。该方案在真实的硬件嵌入式平台上进行了评估。实验结果表明，所提出的技术可以在虚拟化的移动设备中将写入性能提高到45.21％。

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