共查询到20条相似文献,搜索用时 15 毫秒
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介绍了基于移动Agent的网络管理结构模型及其优势所在,针对Java语言的特点,分析了Java语言开发移动Aggent的优势和几点技术解决方案。 相似文献
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在讨论传统集中式网络管理方式和一般分布式客户/服务器模式网络管理方式存在的局限性基础上,阐述移动智能主体应用于网络管理的策略,表明移动智能主体应用于网络管理具有降低网络交通流量、节省网络带宽、平衡网络资源负荷、配置灵活、可扩展性好以及反应及时等优点,具有良好的应用前景。 相似文献
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More recently, distributed variants of tuple spaces have been proposed to exploit the Linda model for programming distributed applications over wide area networks, possibly exploiting code mobility. However, the flexibility of the shared tuple space model opens possible security holes; it basically provides no access protection to the shared data. In this paper we investigate some possible scenarios where mobile agents can benefit from our cryptographic tuple space based framework, CryptoKlava, and sketch how to possibly implement such agents in order to keep the privacy of items collected by the mobile agent during its itinerary. The functionalities of the framework are general enough to be applied to other Java frameworks using multiple distributed tuples spaces possibly dealing with code mobility. 相似文献
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在分析了传统网管系统不足的基础上,提出了一种分布式的网络管理模型,然后对故障管理的功能进行了描述,引入了移动代理技术后,设计了该模型基于移动代理的应用框架,最后对基于该模型的网络故障管理系统的性能进行了评估。通过性能评估分析表明本故障管理模型具有不错的性能表现。 相似文献
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Coordination for Internet Application Development 总被引:8,自引:0,他引:8
The adoption of a powerful and expressive coordination model represents a key-point for the effective design and development of Internet applications. In this paper, we present the TuCSoN coordination model for Internet applications based on network-aware and mobile agents, and show how the adoption of TuCSoN can positively benefit the design and development of such applications, firstly in general terms, then via a TuCSoN-coordinated sample application. This is achieved by providing for an Internet interaction space made up of a multiplicity of independently programmable communication abstractions, called tuple centres, whose behaviour can be defined so as to embody the laws of coordination. 相似文献
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The tuple space abstraction is a powerful and general coordination model for parallel and distributed programming. However, this model is based on the abstraction of a global space, difficult to implement in distributed memory parallel systems with high-performance and scalability. The paper discusses the possible distribution strategies to implement a tuple space server and proposes a new replication policy suitable for massively parallel systems. The proposed strategy achieves scalability by organising the system in a hierarchical way and by integrating coherence protocols of limited overhead. Moreover, the chosen organisation encourages the presence of multiple tuple spaces each with a constrained scope. The paper describes and analyses a transputer-based implementation: the hierarchical organisation of the tuple space makes the access time proportional to the locality of the references and bounded by the logarithm of the system size. © 1998 John Wiley & Sons, Ltd. 相似文献
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设计了一种应用于移动通信网络的服务漫游系统:MASM(MobileAgentBasedServiceMobility),并提出了用MobileAgent技术实现服务漫游的新思路。MASM系统充分利用了MobileAgent和Java技术的优势,提出了用“打点”和模块化等技术设计MobileAgent的新方法,从而有效地减少了网络传输负载,灵活地实现了跨不同网络的服务漫游。文章着重为现有的移动通信系统设计一种服务漫游的方案和一个合理的MobileAgent内部结构,并对其加以实现。 相似文献
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针对传统的基于SNMP协议的网络管理系统的不足,提出了一种采用移动代理(MobileAgent)技术来实现网络管理的模型,一定的区域内设置一个代理服务器,在网络管理服务器和代理服务器上都驻留有固定代理(StationaryAgent)。网络管理服务器根据实际情况选择适当功能的移动代理发送到代理服务器上,在代理服务器上完成预期功能。文章详细讨论系统设计和实现的关键技术,表明在网络管理中采用移动代理技术可以很好地解决目前集中式网络管理中遇到的相关问题,能有效提高网络管理的可靠性和效率。 相似文献
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本文就利用移动Agent技术实现分布式网管的问题进行了讨论,给出了分布式网管系统的结构模型,描述了各Agent的功能,并对系统实现进行了一定的说明.系统现已实现网络的配置管理、性能管理和故障管理功能. 相似文献
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Highly distributed networks have now become a common infrastructure for wide‐area distributed applications whose key design principle is network awareness, namely the ability to deal with dynamic changes of the network environment. Network‐aware computing has called for new programming languages that exploit the mobility paradigm as a basic interaction mechanism. In this paper we present the architecture of KLAVA , an experimental Java package for distributed applications and code mobility. We describe how KLAVA permits code mobility by relying on Java and present a few distributed applications that exploit mobile code programmed in KLAVA . Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
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面向网络管理的移动主体安全设施 总被引:7,自引:0,他引:7
移动主体技术为网络管理提供了一种新方法,但同时也带来了一些不安全因素.全面分析了采用策略与移动主体技术进行网络管理所面临的各种安全问题和相应的解决方案,提出了面向网络管理的移动主体安全设施MASF(mobile Agent security facility).MASF无缝集成了存储保护、加密、鉴别、完整.陛验证、授权、访问控制、安全日志等安全机制.基于MASF开发了一个实际的域间虚拟专用网络管理系统,应用表明,MASF能较好地满足网络管理的安全需求. 相似文献
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一种面向移动Agent网络管理的安全模型 总被引:1,自引:0,他引:1
基于移动Agent的网络管理模型利用移动Agent对网络进行灵活的管理,但该模型中网络管理站、被管理节点和移动Agent存在的安全问题阻碍了其进一步的发展和应用.研究这些安全问题,利用Java卡和加密技术构建一个综合的安全模型,给出安全管理过程.实例分析表明该模型能够对网络管理过程有效地实施硬件和软件的安全保护. 相似文献
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将基于Web的现代分布式网络管理技术和移动代理结合,提出新的分布式网络管理模型,并提出了原型系统的设计构想。 相似文献
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Raffaele Quitadamo Giacomo Cabri Letizia Leonardi 《Science of Computer Programming》2008,70(2-3):221-240
Today’s complex applications must face the distribution of data and code among different network nodes. Computation in distributed contexts is demanding increasingly powerful languages and execution environments, able to provide programmers with appropriate abstractions and tools. Java is a wide-spread language that allows developers to build complex software, even distributed, but it cannot handle the migration of computations (i.e. threads), due to intrinsic limitations of many traditional JVMs. After analyzing the approaches in the literature, this paper presents our thread migration framework (called Mobile JikesRVM), implemented on top of the IBM Jikes Research Virtual Machine (RVM): exploiting some of the innovative techniques in the JikesRVM, we implemented an extension of its scheduler that allows applications to easily capture the state of a running thread and makes it possible to restore it elsewhere (i.e. on a different hardware architecture or operating system), but still with a version of the framework installed). Our thread serialization mechanism provides support for both proactive and reactive migration, available also for multi-threaded Java applications, and tools to deal with the problems of resource relocation management. With respect to previous approaches, we implemented Mobile JikesRVM without recompiling its JVM (Java Virtual Machine) source code, but simply extending JikesRVM functionalities with a full Java package to be imported when thread migration is needed. 相似文献
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Mobile IP网络中主动分布式移动网络管理系统 总被引:2,自引:0,他引:2
由于无线移动网络带宽低、延迟高以及移动性强的特点,传统的SNMP集中式网管也由于自身的缺陷无法,接有效地对无线移动网络进行管理.为此,我们提出了一个Mobile IP网络中主动分布式移动网络管理系统的结构框架即将新型分布式网络体系结构一主动网络融合于移动网络管理.本文详细描述了系统工作流程、管理过程以及功能结构,并在一个宽带无线IP网络中进行了原型实验,实验结果证明系统高效、分布、灵活和可扩展. 相似文献