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Energy consumption in data center has already become a widely concerned issue in cloud computing research. There are many studies on data center energy efficiency optimization. But most of them focus on the energy consumption of the servers and cooling equipment. Few of them considered data center network (DCN), which is also a significant energy consuming component. By applying newly emerged Software...
The advent of the big data era, the rapid development of mobile internet, and the rising demand of cloud computing services require increasingly more compute capability from their data center. This compute increase will most likely come from higher rack and room power densities or even construction of new Internet data centers. But an increase in a data center's business-critical IT equipment (servers,...
Massive cloud-based data-intensive applications (e.g., iterative MapReduce-based) could involve graph data processing. How to effectively analyze and process large-scale graph data is an unsolved challenging problem. We present a parallel computation framework, named MyBSP, which is inspired by Google's Pregel system. MyBSP supports and implements the Bulk Synchronous Parallel (BSP) programming model,...
How to effectively process massive graph data is an intractable challenging issue. In this paper, two types of parallel computation approaches were compared: MapReduce and MyBSP. MyBSP is our open source implementation which adopts the Bulk Synchronous Parallel (BSP) programming model to support iterative processing. The MapReduce-based and MyBSP-based PageRank algorithms were implemented respectively...
Virtual machine (VM) placement is a key technologyto improve data center efficiency. Most works consider VM placement problem only with respect to physical machine(PM) or network resource optimization. However, efficient VM placement should be implemented by joint optimization of above two aspects. In this paper, a multi-objective VM placement model to minimize the number of active PMs, minimize communication...
The execution of web applications always involves many levels (Operating system, Java virtual machine, Web server, Database server, application itself). Each level can produce its corresponding logs, which record the information of the level's running state and history. Based on the multi-level logs generated by the running web systems, this paper proposes a comprehensive method to evaluate and analyze...
Aiming at the demand on spatial information technology from rural statistics, this paper carried out the research and the development of “rural social economic statistics information spatial management and analysis under B/S mode”. By studying MapGuide Open Source, a Web GIS platform is built in order to realize the spatiality and network distribution of social economic statistic data.
This paper presents a novel video service system DCSVS (distributed collaborative set-top-box video service), which encompasses several practical and effective solutions to both live and VoD (video-on-demand) services. DCSVS is established on an overlay DHT (distributed hash table) network, which improves Kademlia protocol to fit for real-time application. We use several types of pre-fetching to enhance...
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