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Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 867167, 13 pages
http://dx.doi.org/10.1155/2013/867167
Research Article

C-Aware: A Cache Management Algorithm Considering Cache Media Access Characteristic in Cloud Computing

1School of Computer and Information Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
2Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080, China
3Zhejiang University of Technology, Hangzhou 310014, China

Received 10 August 2013; Accepted 5 September 2013

Academic Editor: Yoshinori Hayafuji

Copyright © 2013 Zhu Xudong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Data congestion and network delay are the important factors that affect performance of cloud computing systems. Using local disk of computing nodes as a cache can sometimes get better performance than accessing data through the network. This paper presents a storage cache placement algorithm—C-Aware, which traces history access information of cache and data source, adaptively decides whether to cache data according to cache media characteristic and current access environment, and achieves good performance under different workload on storage server. We implement this algorithm in both simulated and real environments. Our simulation results using OLTP and WebSearch traces demonstrate that C-Aware achieves better adaptability to the changes of server workload. Our benchmark results in real system show that, in the scenario where the size of local cache is half of data set, C-Aware gets nearly 80% improvement compared with traditional methods when the server is not busy and still presents comparable performance when there is high workload on server side.