检索结果-内蒙古大学图书馆

Negotiated Coscheduling in a P2P Based HPC Platform

Negotiated Coscheduling in a P2P Based HPC Platform

第六届网格与协同计算国际会议(The Sixth International Conference on grid and Cooperative computing GCC 2007)

作者： Fei Luo Hai Jin Xiaofei Liao Qin Zhang Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

To promote peer-to-peer (P2P) based high performance computing (HPC), new scheduling strategies are necessarily designed to break the limitation in current systems, which only support applications with independent tasks. Therefore, we introduce a negotiated coscheduling policy, which supports applications with interactive tasks in a structured P2P based HPC platform, P2HP-2. In this policy, with the help of a project description file, a negotiated dispatching metric with two priorityentitling algorithms is proposed, which distributes tasks across computing resources. The coscheduling is further processed with two steps: spinning for dependent data and performing tasks' ***, a reliable message-event transmission method and a load balancer are developed to improve the performance. All our preliminary results show that this scheduling policy is efficient and fault-tolerant to support applications with task-dependent relationships.

关键词： Processor scheduling Distributed computing Concurrent computing Pervasive computing grid computing Internet Computer science Peer to peer computing High performance computing Application software

来源：评论

学校读者我要写书评

暂无评论

VolunteerLive: Introducing Volunteer Nodes into P2P Live Streaming

VolunteerLive: Introducing Volunteer Nodes into P2P Live Str...

引用

International Conference on Intelligent Pervasive computing (IPC)

作者： Xuping Tu Hai Jin Xiaofei Liao Qi Huang Hong Yao 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)9780769530062;0739530060

In P2P live streaming system, service will be degraded when thousands of semi-riders, peers with very limited outbound bandwidth, concurrently join. Due to the limited outbound bandwidth, a semi-rider peer always gets more data than its contributions. In this paper, we propose VolunteerLive, an incentive-based P2P live streaming model, to address this issue. In VolunteerLive, these asymmetrical users are encouraged to "deposit" their bandwidth resources to relay data using their network bandwidth resources. They can enjoy the services as semi-riders in the future. We also propose ContriMax, a heuristics data scheduling algorithm designed for volunteers to collect and maximize the contributions of them. Simulations have been conducted to evaluate the performance of the proposed VolunteerLive and ContriMax. The results show that VolunteerLive model is feasible to support more semi-riders and greatly decrease the stress on the media server.

关键词： Bandwidth Peer to peer computing Scheduling algorithm Streaming media Algorithm design and analysis Pervasive computing grid computing Computer science Degradation Relays

来源：评论

学校读者我要写书评

暂无评论

Building an automated trust negotiation system

Building an automated trust negotiation system

引用

International Conference on Information, Communications and Signal Processing

作者： Hai Jin Zhensong Liao Deqing Zou Chisong Li 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)9781424409822;1424409829

Automated trust negotiation (ATN) is an important means to establish trust between strangers through the exchange of digital credentials and mobile access control policies specifying what combinations of credentials a stranger must submit. While ATN provides a good mechanism to share resources in the distributed environments, there still exist some problems in ATN. A notable issue is that it is difficult to build a practical system. And no guidance is given on how to realize an ATN system. Previous work focused on presenting trust negotiation models or schemes, and most work aimed at protecting privacy and preventing sensitive information from leaking. In this paper, we pay much attention on how to build an ATN system, and design and implement a toy ATN system. We present a new means to implement access control policy, digital credential and its matching. A use case is studied to prove the toy system is sound and reasonable.

关键词： Access control Protocols Protection grid computing Computer science Mobile computing Privacy Authentication Authorization LAN interconnection

来源：评论

学校读者我要写书评

暂无评论

PBJIM: Plugin-based Job Interoperation Mechanism for Heterogeneous grid systems

PBJIM: Plugin-based Job Interoperation Mechanism for Heterog...

引用

第六届网格与协同计算国际会议(The Sixth International Conference on grid and Cooperative computing GCC 2007)

作者： Song Wu Yongcai Tao Zhongqing Xu Service Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

With the development of grid technology, grid gains more popularity that ever and a variety of grid middlewares come into being. However, most of grid middlewares are developed by their own, and it's not easy to interoperate these grid platforms. Existing grid interoperability projects mainly resorts to case-by-case mechanism, which is simple but of poor scalability. Job management is the core and the most complex components of grid system. To realize the interoperability of heterogeneous grids, the interoperation of heterogeneous job managements must be addressed In the paper, a plugin based job interoperation mechanism for heterogeneous grid systems, called PBJIM, is proposed, which is based on the idea of virtualization and plug-in *** are two well-established grid systems in China,Chinagrid and China National grid, and they are built with two different grid middlewares, CGSP and VEGA. Via PBJIM, the interoperation of job management of these two grid systems is achieved.

关键词： Middleware grid computing Information management Identity management systems Computer science Scalability Standards development Data security Information security Management information systems

来源：评论

学校读者我要写书评

暂无评论

Research on Architecture of grid-Based Simulation Platform

Research on Architecture of Grid-Based Simulation Platform

引用

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

作者： Song Wu Li Qi Hai Jin Heng He Key Lab of Cluster and Grid Computing Key Lab of Service Computing Technology and System Ministry of Education Huazhong University of Science and Technology Wuhan Hubei China

This paper proposes a grid-based Distributed Simulation Platform (GDSP). It is designed to break the limitation of legacy simulation supporting platform and to meet new requirements from large-scale, distributed, and complicated systems. Simulation services are encapsulated by using web services technology, and they are basic elements of GDSP. With grid technology, GDSP enables users to share, access, and operate remote resource transparently. It is also easier to organize and manage simulation resources. GDSP improves the capability of fault tolerance and provides mechanism of using simulation resources securely. The research result shows that through this management mechanism, multiple users can share and monitor RTI resources, and manage the simulation collaboratively and effectively. At the same time, the impact on real time of RTI caused by the system is minimum.

关键词： Computational modeling Resource management Web services Computer architecture Application software Large-scale systems Fault tolerance Distributed computing Context modeling Runtime

来源：评论

学校读者我要写书评

暂无评论

PKTown: A Peer-to-Peer Middleware to Support Multiplayer Online Games

PKTown: A Peer-to-Peer Middleware to Support Multiplayer Onl...

引用

International Conference on Multimedia and Ubiquitous Engineering (MUE)

作者： Hai Jin Hong Yao Xiaofei Liao Sirui Yang Wei Liu Yong Jia Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory Huazhong University of Science and Technology Wuhan China School of Computer Science and Technology China University of Geoscience Wuhan China

Peer-to-peer (P2P) system can support service for lots of end users with little hardware investment, which suits for the efforts to lower down the service cost for multiplayer online games (MOG). In this paper, we introduce PKTown, a P2P middleware inserted into Star Craft and the network layer. PKTown captures all packets generated by Star Craft. We apply application layer multicast (ALM) to transmit the broadcast packets through overlay network. PKTown extends the LAN game experiences to players belong to different LAN. We design a k-regular random overlay network based on game specific requirements analysis. No change is made on binary code of Star Craft. Preliminary test results show that PKTown works well and supports other MOG in the same way. Our contribution is to provide a new game experience method with little hardware investment.

关键词： Peer to peer computing Middleware Local area networks Hardware Investments Web server Costs Broadcasting Binary codes Testing

来源：评论

学校读者我要写书评

暂无评论

grid Security Interoperation between CGSP and VEGA

Grid Security Interoperation between CGSP and VEGA

引用

International Conference on Future Generation Communication and Networking (FGCN)

作者： Deqing Zou Hai Jin Xueguang Chen Zongfen Han Cluster and Grid Computing Laboratory Services Computing Technology and System Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9780769530482;0769530486

grid computing emerges as an effective technology to couple geographically distributed resources and solve large-scale computational problems in wide area networks. There are several popular grid platforms, such as UNICORE and Globus Toolkit. Many famous grid projects are constructed with these platforms, each of which manages different distributed resources. In order to aggregate resources managed by different grid platforms, it is necessary to implement the interoperation among these grid platforms. Security interoperation is one of key issues for the interoperation. CGSP (Chinagrid Support Platform) and VEGA are two popular grid platforms in China. To achieve security interoperation between these two platforms, four mapping policies, including user-user mapping, user-agora mapping, role-user mapping, role-agora mapping, are proposed in this paper. The security interoperation process is proposed based on SAML specification and the mapping policies. We also analyze the flexibility of mapping policies and the security of the interoperation process.

关键词： Security Resource management grid computing Authentication Large-scale systems Computer networks Distributed computing Wide area networks Web services Middleware

来源：评论

学校读者我要写书评

暂无评论

HAND: Highly Available Dynamic Deployment Infrastructure for Globus Toolkit 4

HAND: Highly Available Dynamic Deployment Infrastructure for...

引用

Euromicro Conference on Parallel, Distributed and Network-Based Processing

作者： Li Qi Hai Jin Ian Foster Jarek Gawor Cluster and Grid Computing Laboratory Services Computing Technology and System Laboratory Huazhong University of Science and Technology Wuhan China Department of Computer Science University of Chicago USA Mathematics and Computer Science Division Argonne National Laboratory USA

grid computing is becoming more and more attractive for coordinating large-scale heterogeneous resource sharing and problem solving. Of particular interest for effective grid computing is a software provisioning mechanism. We propose a highly available dynamic deployment infrastructure, HAND, based on the Java Web services core of Globus toolkit 4. HAND provides capability, availability, and extensibility for dynamic deployment of Java Web services in dynamic grid environments. We identify the factors that have impact to dynamic deployment in static and dynamic environments. We also present the design, analysis, implementation, and evaluation of two different approaches to dynamic deployment (service level and container level), and examine the performance of alternative data transfer protocol for service implementations. Our results demonstrate that HAND can deliver significantly improved availability and performance relative to other approaches

关键词： grid computing Java Web services Availability Large-scale systems Resource management Problem-solving Performance analysis Containers Protocols

来源：评论

学校读者我要写书评

暂无评论

Integrating Attribute and Status Constraint into the RBAC Model for Access Control in Ubiquitous systems

Integrating Attribute and Status Constraint into the RBAC Mo...

引用

International Conference on Future Generation Communication and Networking (FGCN)

作者： Deqing Zou Jong Hyuk Park Tai-hoon Kim Xueguang Chen Cluster and Grid Computing Laboratory & Services Computing Technology and System Laboratory School of Computer Science and Technology Huazhong University of Science and Technology China Department of Computer Engineering Kyungnam University Masan Gyeongsangnam South Korea Hannam University South Korea Department of Control Science and Engineering Huazhong University of Science and Technology China

It now becomes a trend to implement the interconnections between resources as well as services in ubiquitous systems. Attribute-based authorization mechanisms, protocols and systems are gaining in popularity, such as SAML, XACML, Shibboleth, etc. However, their management efficiency could be further improved. The Role-based Access Control (RBAC) mechanism is widely accepted as a general mechanism for authorization management. However, RBAC is still not flexible enough to address various application scenarios in ubiquitous systems. We propose a new architecture for access control in ubiquitous systems that impose attribute and status constraints on the RBAC model, which can significantly enhance the generality and flexibility of authorization by integrating the advantages of RBAC and attributed- based access control models. Moreover, the state mechanism proposed in this architecture captures the states of the authorization elements so as to reflect the outcomes of the authorization control. Finally, we analyze the flexibility and generality of this architecture in ubiquitous systems.

关键词： Access control Authorization Permission grid computing Pervasive computing Access protocols Application software Markup languages Computer science Control system analysis

来源：评论

学校读者我要写书评

暂无评论

grid information integration scheme based on virtual client access mode

引用

Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and technology (Natural Science Edition) 2007年第SUPPL. 2期35卷 8-11页

作者： Sun, Aobing Jin, Hai Zheng, Ran Zhang, Qin Services Computing Technology and System Key Lab. College of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Cluster and Grid Computing Key Lab. College of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

VCA (virtual client access) based grid information integration strategy is proposed in this paper that brings forward one efficient application framework with loosely coupled architecture. It encapsulates the virtual clients that are realized based on the API of the information systems as grid services to enable the grid can access the information systems as real client. VCA mode can be combined with local access control and task management seamlessly, and solve the resource conflicts between grid and local users so as to support the information sharing and cooperation widely and efficiently. The experiment shows that VCA modes can support the information sharing and cooperation widely and efficiently.

关键词： Information management

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：