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Image-Content-Aware I/O Optimization for Mobile Virtualization

Image-Content-Aware I/O Optimization for Mobile Virtualization Image-Content-Aware I/O Optimization for Mobile Virtualization RENHAI CHEN, Tianjin University and The Hong Kong Polytechnic University YI WANG, Shenzhen University JINGTONG HU, Oklahoma State University DUO LIU, Chongqing University ZILI SHAO, The Hong Kong Polytechnic University YONG GUAN, Capital Normal University Mobile virtualization introduces extra layers in software stacks, which leads to performance degradation. Notably, each I/O operation has to pass through several software layers to reach the NAND-flash-based storage systems. This article 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 to update metadata. Frequently updated metadata not only degrade overall I/O performance but also severely reduce flash memory lifetime. In this article, we propose a novel I/O optimization technique to identify the metadata of a guest file system that is stored in a virtual machine image file and frequently updated. Then, these metadata are stored in a small additional non-volatile memory (NVM), which is faster and more endurable to greatly improve flash memory's performance and lifetime. To the best of our knowledge, this is the first work to identify the file system metadata http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ACM Transactions on Embedded Computing Systems (TECS) Association for Computing Machinery

Image-Content-Aware I/O Optimization for Mobile Virtualization

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Publisher
Association for Computing Machinery
Copyright
Copyright © 2016 by ACM Inc.
ISSN
1539-9087
DOI
10.1145/2950059
Publisher site
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Abstract

Image-Content-Aware I/O Optimization for Mobile Virtualization RENHAI CHEN, Tianjin University and The Hong Kong Polytechnic University YI WANG, Shenzhen University JINGTONG HU, Oklahoma State University DUO LIU, Chongqing University ZILI SHAO, The Hong Kong Polytechnic University YONG GUAN, Capital Normal University Mobile virtualization introduces extra layers in software stacks, which leads to performance degradation. Notably, each I/O operation has to pass through several software layers to reach the NAND-flash-based storage systems. This article 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 to update metadata. Frequently updated metadata not only degrade overall I/O performance but also severely reduce flash memory lifetime. In this article, we propose a novel I/O optimization technique to identify the metadata of a guest file system that is stored in a virtual machine image file and frequently updated. Then, these metadata are stored in a small additional non-volatile memory (NVM), which is faster and more endurable to greatly improve flash memory's performance and lifetime. To the best of our knowledge, this is the first work to identify the file system metadata

Journal

ACM Transactions on Embedded Computing Systems (TECS) – Association for Computing Machinery

Published: Oct 23, 2016

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