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VRFPS: A Novel Virtual Machine-Based Real-time File Protection system

VRFPS: A Novel Virtual Machine-Based Real-time File Protecti...

引用

International Conference on Software Engineering Research, Management and Applications (SERA)

作者： Feng Zhao Yali Jiang Guofu Xiang Hai Jin Wenbin Jiang 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 virtualization technology, file protection in virtual machine, especially in guest OS, becomes more and more important. Traditional host-based file protection system resides the critical modules in monitored system, which is easily explored and destroyed by malwares. Moreover, in order to protect the multiple operation systems running on the same platform, it is necessary to install independent file protection system for each of them, which greatly wastes computing resources and brings serious performance overhead. In this paper, a novel VM-based real-time file protection system, named VRFPS, is proposed to solve these problems. First, virtual machine monitor introspects all file operations of guest OS. Then, semantic gap between disk block and logic files is narrowed by blktap. Finally, a virtual sandbox is implemented in privileged domain to prevent protected files in guest domain from modifying illegally. Our approach is highly isolated, transparent and without modification on virtual machine monitor and guest OS. The experimental results show that the presented system is validate and of low performance overhead.

关键词： Real time systems Protection Virtual machining Kernel Operating systems Virtual machine monitors Application virtualization Data security Access control Software engineering

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PMonitor: A Lightweight Performance Monitor for Virtual Machines

PMonitor: A Lightweight Performance Monitor for Virtual Mach...

引用

International Workshop on Education technology and Computer Science, ETCS

作者： Zhiyuan Shao Hai Jin Xiaowen Lu 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

Performance monitor for virtual machines can monitor the performance metrics of virtual machines and gain the resource consumption status, and thus provide reliable basis for system performance evaluation and further management. However, at current stage, such performance monitor systems for the virtualized systems are inadequate and inefficient. In this paper, we propose a lightweight performance monitor system model for virtual machines, called PMonitor. Through prototype implementation and experiments, we find that PMonitor consumes very few processing power, which is much lower than other open source performance monitors running on the virtualized environments.

关键词： Condition monitoring Virtual machine monitors Virtual machining Measurement Performance gain system performance Resource management Power system management Power system modeling Virtual prototyping

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VirtCFT: A Transparent VM-Level Fault-Tolerant system for Virtual clusters

VirtCFT: A Transparent VM-Level Fault-Tolerant System for Vi...

引用

International Conference on Parallel and Distributed systems (ICPADS)

作者： Minjia Zhang Hai Jin Xuanhua Shi Song Wu 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

A virtual cluster consists of a multitude of virtual machines and software components that are doomed to fail eventually. In many environments, such failures can result in unanticipated, potentially devastating failure behavior and in service unavailability. The ability of failover is essential to the virtual cluster's availability, reliability, and manageability. Most of the existing methods have several common disadvantages: requiring modifications to the target processes or their OSes, which is usually error prone and sometimes impractical; only targeting at taking checkpoints of processes, not whole entire OS images, which limits the areas to be applied. In this paper we present VirtCFT, an innovative and practical system of fault tolerance for virtual cluster. VirtCFT is a system-level, coordinated distributed checkpointing fault tolerant system. It coordinates the distributed VMs to periodically reach the globally consistent state and take the checkpoint of the whole virtual cluster including states of CPU, memory, disk of each VM as well as the network communications. When faults occur, VirtCFT will automatically recover the entire virtual cluster to the correct state within a few seconds and keep it running. Superior to all the existing fault tolerance mechanisms, VirtCFT provides a simpler and totally transparent fault tolerant platform that allows existing, unmodified software and operating system (version unawareness) to be protected from the failure of the physical machine on which it runs. We have implemented this system based on the Xen virtualization platform. Our experiments with real-world benchmarks demonstrate the effectiveness and correctness of VirtCFT.

关键词： Virtual machining Fault tolerant systems Fault tolerance Checkpointing Protocols Kernel

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Live virtual machine migration with adaptive, memory compression

Live virtual machine migration with adaptive, memory compres...

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IEEE International Conference on cluster computing

作者： Hai Jin Li Deng Song Wu Xuanhua Shi Xiaodong Pan 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

Live migration of virtual machines has been a powerful tool to facilitate system maintenance, load balancing, fault tolerance, and power-saving, especially in clusters or data centers. Although pre-copy is a predominantly used approach in the state of the art, it is difficult to provide quick migration with low network overhead, due to a great amount of transferred data during migration, leading to large performance degradation of virtual machine services. This paper presents the design and implementation of a novel memory-compression-based VM migration approach (MECOM) that first uses memory compression to provide fast, stable virtual machine migration, while guaranteeing the virtual machine services to be slightly affected. Based on memory page characteristics, we design an adaptive zero-aware compression algorithm for balancing the performance and the cost of virtual machine migration. Pages are quickly compressed in batches on the source and exactly recovered on the target. Experiment demonstrates that compared with Xen, our system can significantly reduce 27.1% of downtime, 32% of total migration time and 68.8% of total transferred data on average.

关键词： Virtual machining Virtual manufacturing Degradation Voice mail Power system management Load management Fault tolerant systems Energy management Chromium Computers

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Yarqs: Yet Another Range Queries Schema in DHT Based P2P Network

Yarqs: Yet Another Range Queries Schema in DHT Based P2P Net...

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International Conference on Computer and Information technology (CIT)

作者： Hao Zhang Hai Jin Qin Zhang 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

Range query in DHT based P2P network is a hot topic in recent researches. The hashing function in DHT protocols makes the data hard to keep their original order relationship. Hence range queries for such networks become difficult. This paper presents the design of Yarqs-a new schema to achieve range queries in DHT based P2P networks. By using the inherent characteristics of DHT based networks, Yarqs catches the data pass the nodes and organizes them as a cache network. The range queries are deployed over the cache network. Yarqs does not change the design of the DHT overlay and builds the architecture for range queries by using the historical DHT queries data. Yarqs supports inherent load balancing. We also study the performance of Yarqs in evaluation section. The experiments to check the influences of different parameters of Yarqs are deployed and analyzed.

关键词： Load management Peer to peer computing Data structures Protocols grid computing Computer networks Information technology Computer science Dictionaries Costs

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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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systems and Virtualization Management. Standards and the Cloud 1

引用

丛书名： Communications in Computer and Information Science

1000年

作者： Latifa Boursas Mark Carlson Hai Jin Michelle Sibilla Kes Wold

ISBN: (数字)9783642149443

ISBN: (纸本)9783642149436

This volume contains the proceedings of the Third International DMTF Academic Alliance Workshop on systems and Virtualization Management: Standards and the Cloud (SVM 2009) held in Wuhan, china, during September 22-23, 2009. The SVM 2009 proceedings are intended for use by students of systems and vir- alization management. The reader is presumed to have a basic knowledge of systems management technologies and standards at the level provided, for example, by the Common Information Model (CIM) standard for modeling management resources. The student of systems management will find here material that could be included in an advanced study program. These proceedings should furthermore allow students to acquire an appreciation of the breadth and variety of systems and virtualization m- agement research. The proceedings also illuminate related standards and research issues, answering questions such as: what are the implications of virtualization for distributed systems management, which advances in information models and protocols aid in managing virtualization, what new problems will we incur when managing virtualized systems and services, and how might management itself benefit from virtualization? Topics related to managing distributed systems, virtualization of distributed - sources/services and work in management standardization are also highlighted. There were 28 regular paper submissions. These went through an active review process, with each submission reviewed by at least three members of the Program Committee. We also sought external reviews from experts in certain areas. All these inputs were used by the Program Committee in selecting a final program with 12 regular papers.

关键词： Information systems Applications (incl. Internet) Computer Communication Networks Computation by Abstract Devices Information Storage and Retrieval Software Engineering Artificial Intelligence

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XenLR: Xen-based Logging for Deterministic Replay

XenLR: Xen-based Logging for Deterministic Replay

引用

Japan-china Joint Workshop on Frontier of Computer Science and technology (FCST)

作者： Haikun Liu Hai Jin Xiaofei Liao Zhengqiu Pan 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

Virtual machine (VM) based logging-and-replay technology has attracted much attention for system security, fault tolerance, and debugging. However, so far there is not a replay system designed on virtual machine monitor Xen. In this paper, XenLR presents the design and implementation of a logging tool for full system replay on Xen. To reduce the design complexity, XenLR is achieved on a lightweight VM mini OS. Our preliminary work dedicates to identify architectural non-deterministic events and record them compactly. XenLR does not modify the guest OS and only need to record the external inputs (keyboard input and time update on mini OS). The log data are saved in the privileged domain¿s file system through transmission channels. The experiments indicate that XenLR results in low time and space overhead. Overhead due to logging is imperceptible for interactive use. The log files grow at 1.4 MByte/day, so it causes litter space consumption for today¿s large capacity disk storage.

关键词： Space technology Virtual machining Operating systems Computer science Virtual manufacturing Debugging Virtual machine monitors Counting circuits Kernel grid computing

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Adaptive audio-aware scheduling in Xen virtual environment

Adaptive audio-aware scheduling in Xen virtual environment

引用

IEEE/ACS International Conference on Computer systems and Applications

作者： Huacai Chen Hai Jin Kan Hu Minhao 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

With the development of client virtualization technology, it has become an important tendency to apply soft real-time applications in virtual environment. Currently, most schedulers in VMM (i.e., virtual machine monitor) take the fairly sharing of processor resources and load balancing as a main concern, while show less regard to application diversity and I/O responsiveness. This would be unable to meet the requirement for latency-sensitive tasks, such as audio application. Audio stream may suffer from severe input buffer overrun or output buffer underrun, especially in the case that there is no real-time guarantee on virtualized clients under heavy load. In this paper, we introduce experiments to illustrate that current scheduler in Xen does a poor job in guaranteeing fluent audio playing, and then formulate the fluent playing conditions a scheduler should satisfy. A scheduling strategy with soft real-time support is proposed to improve the responsiveness of latency-sensitive guests. To implement our proposition, we extend the Credit scheduler by using flexible time slice and real-time priority. Our solution is audio-aware and capable of adjusting the real-time priority of guest domains adaptively, achieving a better experience for end-users. The experimental results show that audio glitches can be completely eliminated via our extended scheduler even when the system load is very high.

关键词： Client virtualization flexible time slice latency-sensitive real-time priority

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VDE: Seamless Mobility on Desktop Environment

VDE: Seamless Mobility on Desktop Environment

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IEEE International Symposium on Dependable, Autonomic and Secure computing (DASC)

作者： Xiaofei Liao Xianwen Chen Hai Jin Zongfen Han 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

Virtual desktop environment (VDE) provides a real virtual working environment in which users could personally customize and update the application list from application template libraries. The heterogeneous applications actually running in the remote application servers could cooperatively communicate with each other. It is a thin client approach to mobility in which the perfect combination of VM technology and DFS technology are the keys to the rapid seamless resuming of the usage scenarios. Usage scenarios are incrementally suspended including the user's documents and the running applications. The usage data stored in data center provides a unified view for the users through historical scenario manager and ensures the data's security and reliability at the same time. This paper explores the building policy of a real virtual working environment and the suspending/resuming policy of usage scenarios. Experiments demonstrate and evaluate VDE's efficiency and effectiveness.

关键词： Application software Layout Displays Virtual machining Resumes grid computing Linux Switches Image storage Computers

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