This paper presents an objective measure, called overhead ratio, for evaluating distributed checkpointing protocols. This measure extends previous evaluation schemes by incorporating several additional parameters that...
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ISBN:
(纸本)0769519202
This paper presents an objective measure, called overhead ratio, for evaluating distributed checkpointing protocols. This measure extends previous evaluation schemes by incorporating several additional parameters that are inherent in distributed environments. In particular we take into account the rollback propagation of the protocol, which impacts the length of the recovery process, and therefore the expected program run-time in executions that involve failures and recoveries. The paper also analyzes several known protocols and compares their overhead ratio.
Pervasive computing environments are characterized by an additional heterogeneity compared to existing computing infrastructures. Devices ranging from small embedded systems to full-fledged computers are connected via...
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ISBN:
(纸本)0769519210
Pervasive computing environments are characterized by an additional heterogeneity compared to existing computing infrastructures. Devices ranging from small embedded systems to full-fledged computers are connected via spontaneously formed networks. In this paper we analyze requirements of applications and system software to cope with the dynamically changing execution environment. Based on our micro-broker-based middleware BASE a component framework for pervasive computing supporting application adaptation is proposed.
This paper presents a graph-grammar based approach to multimedia document design. By extending an existing powerful graph grammar formalism with spatial relations, we are able to define the spatial and syntactic const...
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ISBN:
(纸本)0769519210
This paper presents a graph-grammar based approach to multimedia document design. By extending an existing powerful graph grammar formalism with spatial relations, we are able to define the spatial and syntactic constraints graphically. An efficient syntax analyzer developed for the grape grammar formalism can validate and automatically perform a presentation on a user provided document structure.
To address the need for highly configurable and customizable distributedsystems, researchers and practitioners are investigating various innovative approaches. One of the promising techniques emerging from this area ...
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ISBN:
(纸本)0769519210
To address the need for highly configurable and customizable distributedsystems, researchers and practitioners are investigating various innovative approaches. One of the promising techniques emerging from this area of study is mobile computing. In this paper we present an architecture-based approach to supporting distributed deployment and mobility of software systems. We exploit a connector-aware architectural middleware in providing these capabilities. The approach has been successfully tested on several applications for networks of small, mobile, resource constrained devices (e.g., hand-held computers).
Group communications systems have been designed to provide an infrastructure for fault-tolerance in distributedsystems, including wide-area systems. In our work on master-worker computation for GriPhyN, which is a la...
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ISBN:
(纸本)0769519202
Group communications systems have been designed to provide an infrastructure for fault-tolerance in distributedsystems, including wide-area systems. In our work on master-worker computation for GriPhyN, which is a large project in the area of the computational grid, we asked the question should we build our wide-area master-worker computation using wide-area group communications? This paper explains why we decided doing so was not a good idea.
This paper describes how a set of agents can be used for collaboration in E-marketing and-E-Auction. We have formalized an integrated model consisting of the salient features of several agent paradigms, and link it wi...
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ISBN:
(纸本)0769519210
This paper describes how a set of agents can be used for collaboration in E-marketing and-E-Auction. We have formalized an integrated model consisting of the salient features of several agent paradigms, and link it with the distributed software engineering methodology. The integrated model proposed here has the simplicity and adaptability for realisation as a distributed transaction based paradigm for negotiation and other E-marketing problems. Also it can provide an insight into the self-organized criticality in a network of agents.
The "tangible file system"(1) is a document management and access infrastructure for the ubiquitous computing era. It provides a transparent user interface which takes advantage of physical user actions for ...
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ISBN:
(纸本)0769519210
The "tangible file system"(1) is a document management and access infrastructure for the ubiquitous computing era. It provides a transparent user interface which takes advantage of physical user actions for the purpose of directory management, data sharing and document location tracking. This is achieved by digitally augmenting both documents and document containers to detect the location of physical information and to trigger corresponding update actions in the electronic world. The system is built using the Datlet [9] architecture to allow any 'tool-objects' to be applied to 'data-objects', thereby enabling an even more natural user interaction based on affordances.
Mobile Agent is regarded as a promising paradigm for future distributedcomputing. Among essential features of mobile agents, communication is a fundamental ability that enables mobile agents to cooperate with each ot...
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ISBN:
(纸本)0769519210
Mobile Agent is regarded as a promising paradigm for future distributedcomputing. Among essential features of mobile agents, communication is a fundamental ability that enables mobile agents to cooperate with each other But the presence of mobility raises a number of new challenges in designing message delivery protocols for effective and efficient communications between mobile agents, especially the Communication Failure and Message Chasing problem for highly mobile agents. In this paper, we firstly discuss ways to solve Communication Failure, and then describe a two-dimensional solution space for designing inter-agent communication protocols. We also propose a reliable and efficient mechanism for mobile agent communication named MEFS, which is implemented flexibly and adaptively. The MEFS provides a location-transparent tracking mechanism and, in particular, guarantees message delivery under any condition in a fault-free network. The experiments demonstrate the performance of MEFS too.
This Paper studies the problem of updates in decentralised and self-organising P2P systems in which peers have low online probabilities and only local knowledge. The update strategy we propose for this environment is ...
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ISBN:
(纸本)0769519202
This Paper studies the problem of updates in decentralised and self-organising P2P systems in which peers have low online probabilities and only local knowledge. The update strategy we propose for this environment is based on a hybrid push/pull rumor spreading algorithm and provides a fully decentralised, efficient and robust communication scheme which offers probabilistic guarantees rather than ensuring strict consistency. We describe a generic analytical model, to investigate the utility of our hybrid update propagation scheme from the perspective of communication overhead.
This paper describes a set of characteristics that partially make up the problem space for real-time data distribution. The characteristics are divided into three groups: system characteristics, real-time characterist...
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ISBN:
(纸本)0769519210
This paper describes a set of characteristics that partially make up the problem space for real-time data distribution. The characteristics are divided into three groups: system characteristics, real-time characteristics, and data characteristics. The paper describes each of the characteristics, and then illustrates them with two current proposed solutions to real-time data distribution problem.
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