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EAPAC: An enhanced application placement framework for data centers

EAPAC: An enhanced application placement framework for data ...

引用

14th IEEE Int. Conf. on Computational Science and Engineering, CSE 2011, the 11th International Symposium on Pervasive systems, Algorithms, and Networks, I-SPAN 2011, and the 10th IEEE Int. Conf. on Ubiquitous computing and Communications, IUCC 2011

作者： Shi, Xuanhua Jiang, Hongbo He, Ligang Jin, Hai Wang, Chonggang Yu, Bo Wang, Fei Service Computing Technology and System Lab./Cluster and Grid Computing Lab. School of Computer Huazhong University of Science and Technology China Department of Electronics and Information Engineering Huazhong University of Science and Technology China Department of Computer Science University of Warwick United Kingdom InterDigital Communications Corp. United States

ISBN: (纸本)9780769544779

Emerging data centers may host a large number of applications that consume CPU power, memory, and I/O resources. Previous studies focus on the allocation of resources in order to perfectly satisfy the demands seen in the current cycle, and the existing application placement algorithms are all based on applications. The existing application placement algorithms in literature assume that the consumption of system resources is proportional to the level of workloads submitted to the system. In this paper, we revealed that it may not be the case in some circumstances. Based on this observation, we design and implement an application placement framework, called EAPAC, for data centers. The developed framework is able to judiciously allocate to application servers a proper mixture of different types of application requests as well as an appropriate number of requests in each type. Further, we investigate the issue of resource conflicts among different applications when there exist concurrent requests in the system. We have conducted extensive experiments to evaluate the performance of the developed framework. The experiment results show that compared with the existing studies, EAPAC can improve the performance by 30% in terms of the reply rate. Especially, when there are concurrent requests in the system, the performance can be improved by 100%. © 2011 IEEE.

关键词： Computer programming

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Content-Based Design Patent Image Retrieval Using Structured Features and Multiple Feature Fusion

Content-Based Design Patent Image Retrieval Using Structured...

引用

International Conference on Image and Graphics (ICIG)

作者： Lei Zhu Hai Jin Ran Zheng Qin Zhang Xia Xie Mingrui Guo Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Traditional design patent verification based on manual comparison is too labor-intensive, time-consuming and subjective to be applied efficiently in practice. Design patent image retrieval system is designed to retrieve some similar patent images with much visual similarities. Structured features and multiple feature fusion are two main technologies to ensure the retrieval accuracy in the system. Block-wise Dense SIFT (Block-DSIFT), Pyramid Histograms of Orientation Gradients (PHOG), and GIST are proposed as main structured features. A multiple feature fusion algorithm for content-based design patent image retrieval is proposed to formulate the fusion as the linear combination of different matrixes which represent different feature distances between images to improve the precision of retrieval. The weights that reflect the significance of the features are determined by quadratic programming and can be solved efficiently. Experiments on a database of real design patent images show good efficiency and robustness of the proposed method and the system can be applied to design patent copyright validation.

关键词： Patents Feature extraction Histograms Image retrieval Shape Measurement Image color analysis

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A voice gateway system based on P2P SIP VoIP

A voice gateway system based on P2P SIP VoIP

引用

International Conference on Pervasive computing and Applications (ICPCA)

作者： Xiaofei Liao Hai Jin Chang Shu Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781457702099

Introducing the P2P (Peer-to-Peer) technology into SIP (Session Initiation Protocol) networks can improve VoIP (Voice on Internet Protocol) system's reliability and scalability, and reduce the operating costs. In order to provide better and more comprehensive services in VoIP system, it is necessary to communicate with the traditional telecommunications networks, including PSTN (Public Switched Telephone Network), by a voice gateway. The voice gateway system for P2P-based SIP VoIP builds the connection, and transforms signaling and media, between IP service network and PSTN. SIP-in-P2P is implemented in voice gateway system, using DHT (Distributed Hash Table) scheme to connect VGW (Voice Gateway) nodes in the P2P SIP network. Based on the GWMN (Gateway Management Node) protocol, the system can manage VGW nodes in the management domain, and designed the discovery strategies and load balancing strategies to improve the performance. Results indicate that the voice gateway system performs with good reliability, scalability, interoperability and feasibility.

关键词： Logic gates Peer to peer computing Lead Motion pictures Cryptography Telecommunication network reliability

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Measuring and Analyzing CPU Overhead of Virtualization system

Measuring and Analyzing CPU Overhead of Virtualization Syste...

引用

IEEE Asia-Pacific Conference on services computing (APSCC)

作者： Guan Tong Hai Jin Xia Xie Wenzhi Cao Pingpeng Yuan Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Virtualization as a powerful and convenient technique has been widely used recently. Inserting the VMM between the hardware and operation system enables multiple virtual machines simultaneously running on hardware. However, these changes in system architecture, while improving the whole physical computing resources' utilization, also pay a certain price for virtualization. How to measure this part of CPU overhead, and how about the relationship between this part of CPU overhead and virtual machine number and the type of workload executing in virtual machine are two important questions to the further research of virtualization performance. In this paper we provide a system to measure the overhead of virtualization. With this system we could dynamically obtain the utilization of computing resource. Based on the analysis to the results of several experiments, we compare and study the relationship between the different factors and the overhead of virtualization. Finally, we predict the probably trend of the overhead under the impact of some factors.

关键词： Virtual machining Virtual machine monitors Servers Hardware Schedules Kernel

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Sharing Virtual USB Device in Virtualized Desktop

Sharing Virtual USB Device in Virtualized Desktop

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International Symposium on Parallel Architectures, Algorithms and Programming (PAAP)

作者： Xiaofei Liao Xiao Xie Hai Jin Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

With the development of computer science, desktop virtualization technology is more and more popular. In virtualized desktop, it is a very significant research to share periphery devices in the client-end computer seamlessly. We implement a device sharing mechanism to extend the universal serial bus in client-end host to the network for server-end host using transparently. This virtual device bus is deployed in the driver layer so that most applications and drivers in virtualized desktop could access remote shared devices through original interface. After deploying the virtual device bus driver, the duplicated virtual device could be accessed just like a real local device. In our implementation, the virtual device bus driver, which is the main module for virtualizing real USB devices and the interface for applications, is OS independent. Experiments show that the mechanism has a very friendly and easy interface to access virtual USB devices, and good performance.

关键词： Universal Serial Bus Protocols IP networks Hardware Linux Computers Kernel

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Fast saving and restoring virtual machines with page compression

Fast saving and restoring virtual machines with page compres...

引用

International Conference on Cloud and Service computing (CSC)

作者： Li Deng Hai Jin Song Wu Xuanhua Shi Jiangfu Zhou Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

More and more enterprises are moving beyond server virtualization to desktop virtualization in recent years. In virtualization environments, centralized shared storage systems are generally used to take advantage of virtualization features such as VM migration. Network file system (NFS) is considered to be the best choice in small or medium sized LANs due to its flexibility and low cost. But it becomes the bottleneck when many clients access the server simultaneously, especially when multiple virtual machines access a large amount of data at the same time, such as operation save and restore. In this paper, we present a new method named ComIO to quickly save and restore virtual machines using page compression. Based on the analysis of virtual machines' memory characteristics, we design a fast enhanced characteristic-based compression (ECBC) algorithm. Combined with multi-threaded techniques, the compression tasks are parallelized for significantly shortened compresssion time. Page boundary alignment is proposed to enable wanted page data to be directly extracted from the compressed block. The experimental results demonstrate that compared with Xen, our method ComIO not only greatly reduces the time spent on saving and restoring virtual machines on average, but also indirectly augments the effective storage space.

关键词： Virtual machining Image coding Instruction sets Compression algorithms Servers Image restoration Algorithm design and analysis

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Scheduling and dropping policies for probabilistic routing in Delay Tolerant Networks

Scheduling and dropping policies for probabilistic routing i...

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International Conference on Pervasive computing and Applications (ICPCA)

作者： Chen Yu Chuanming Liang Xi Li Hai Jin Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781457702099

The Delay Tolerant Network employs a store-carry-forward paradigm to enable bundle delivery in intermittent connected environments. A router relays a message only when a proper contact opportunity occurs, which results in prominent congestion issues. An appropriate scheduling and dropping policy can alleviate this situation and maximize contact capacity. We investigate the impact of delivery probability and number of message replicas over the efficiency of scheduling and dropping policies in probabilistic routing, and present a new way to utilize contact probability and delivery predictability to direct the design of scheduling policies. We also design a simple and distributed method to approximate the global number of replicas. We integrate these results and present a new scheduling and dropping policy. Simulation based on map based movement has shown that the new policy gains a delivery rate very close to global knowledge based policies, and it outperforms all other existing scheduling and dropping policies.

关键词： Frequency modulation

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An Approach to Use cluster-Wide Free Memory in Virtual Environment

An Approach to Use Cluster-Wide Free Memory in Virtual Envir...

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Chinagrid Annual Conference (Chinagrid)

作者： Like Zhou Song Wu Xuanhua Shi Hai Jin Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Memory and I/O intensive applications always use a huge amount of memory and the performance decreases quickly when memory pressure arises. With the development of high performance network and widely used in cluster, the latency of remote memory access is much less than that of disk operation. In this paper, we present an approach to let the VM (Virtual Machine) use cluster-wide free memory, which can overcome the limitation of physical memory by exploiting low-latency access to the memory of other nodes in cluster. This approach can reduce the execution time for memory and I/O intensive applications significantly by utilizing cluster-wide memory and increase the whole cluster utilization.

关键词： Memory management Random access memory Operating systems Virtual machine monitors Servers Programming

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LCM: A lightweight communication mechanism in HPC cloud

LCM: A lightweight communication mechanism in HPC cloud

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International Conference on Pervasive computing and Applications (ICPCA)

作者： Haibao Chen Song Wu Xuanhua Shi Hai Jin Yu Fu Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781457702099

Inspired by the concept of cloud computing, the construction of HPC Cloud with traditional HPC resources not only provides new opportunities to address the challenges to the traditional HPC, but also brings many exciting research problems. One of them is how to reduce the network overhead of virtual cluster in HPC cloud. In order to resolve the problem, this paper presents the design and implementation of lightweight communication mechanism for virtual cluster in HPC Cloud, called LCM, which maintains binary compatibility for applications written in standard socket interface. We implemented our design on Xen 3.2 with Linux kernel 2.6.18, and evaluated the speed of file transfer, the running time of NAS Parallel benchmark and binary compatibility using binary image of real socket applications. In our tests, we have proved that LCM realizes the high performance that is comparable to UNIX domain socket and ensures full binary compatibility.

关键词： IP networks Program processors Educational institutions

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Compounded Face Image Retrieval Based on Vertical Web Image Retrieval

Compounded Face Image Retrieval Based on Vertical Web Image ...

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Chinagrid Annual Conference (Chinagrid)

作者： Ran Zheng Shilei Wen Qin Zhang Hai Jin Xia Xie Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Text-based image search engine and content-based image retrieval (CBIR) have achieved much progress in commerce and academic community. In addition, a few attempts have been conducted to integrate the two techniques for image retrieval in web context. However, it is very difficult for general search engine based on image context to return highly accurate results. Compound face image retrieval system, based on a novel vertical web image retrieval framework, is designed to make comprehensive uses of text, image content and some related technologies in face detection and recognition. It incorporates high-level semantics and low-level visual features of web image and provides more accurate results and good extensibility for further applications.

关键词： Face Feature extraction Image retrieval Filtering algorithms Visualization Histograms

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