Gunther Stuer

PRICING SUBSTITUTABLE GRID RESOURCES USING COMMODITY MARKET MODELS

Enhancing Grid technology with market models for trading resources, is a promising step for Grids to become open systems that allow for user-centric service provisioning. This paper introduces a market model for trading substitutable Grid resources in a commodity market. We develop a pricing scheme and evaluate the market mechanisms through simulation. We show that the resource market achieves price stability and correctness, allocative eciency and fairness.

H2O metacomputing – jini lookup and discovery

Because of its inter-organisational, collaborative use of computational resources, grid computing presents a severe interoperability challenge to grid application developers. Different middleware technologies need to be bridged in order to fully utilise the power the grid provides. This paper describes a bridge between two such middlewares: The H2O Metacomputing Framework and Jini technology. The paper details how H2O resources may be registered, discovered and used as Jini services. Both technologies are introduced, design decisions discussed and a fully functional implementation presented.

User experiences with nuclear physics calculations on a h2o metacomputing system and on the BEgrid

We report on user experiences gathered with quantum nuclear scattering calculations on a H2O based metacomputing system and on the BEgrid, the Belgian EGEE Grid infrastructure. We compare quantifiable aspects such as Grid utilization but also ease-of-use and the experience encountered in porting the application to each of the Grid environments.

Towards OGSA Compatibility in Alternative Metacomputing Frameworks

Lately, grid research has focused its attention on interoperability and standards, such as Grid Services, in order to facilitate resource virtualization, and to accommodate the intrinsic heterogeneity of resources in distributed environments. To ensure interoperability with other grid solutions, it is important that new and emerging metacomputing frameworks conform to these standards. In particular, the H2O system offers several benefits, including lightweight operation, user-configurability, and selectable security levels; with OGSA compliance, its applicability would be enhanced even further In this contribution, a framework is presented which will augment the H2O-system with the functionality to produce and publish WSDL and GSDL documents for arbitrary third party pluglets, and thereby enhance OGSA compatibility.

Towards OGSA compatibility in the H2O metacomputing framework

Lately, grid research has focused its attention on interoperability and standards, such as Grid Services, in order to facilitate resource virtualization, and to accommodate the intrinsic heterogeneity of resources in distributed environments. To ensure interoperability with other grid solutions, it is important that new and emerging metacomputing frameworks conform to these standards. In particular, the H2O-system offers several benefits, including lightweight operation, user-configurability, and selectable security levels; with OGSA compliance, its applicability would be enhanced even further. In this contribution, a framework is presented which will augment the H2O-system with the functionality to produce and publish WSDL- and GSDL-documents for arbitrary third-party pluglets, and thereby enhance OGSA compatibility.

Performance and Stability Analysis of a Message Oriented Reliable Multicast for Distributed Virtual Environments in Java

The aim of this paper is to present the performance and stability analysis of a reliable multicast system. It has been optimized for use in distributed virtual environments and is implemented in Java. The paper will describe the characteristics of our reliable multicast implementation, as observed in our test environment. We will also compare with nonreliable multicast protocols.

The Construction of a Reliable Multipeer Communication Protocol for Distributed Virtual Environments

We present the design and implementation issues of a Reliable MultiPeer Protocol (RMPP). This protocol is suitable for applications in the area of distributed virtual environments and is written in Java. Motivation, protocol classification, design goals and the error recovery algorithm are discussed. This paper concludes by presenting a possible application of the RMPP.

An analysis of the reliability overhead generated by the JRM-protocol

An important aspect of any reliable communications protocol is its robustness against adverse network conditions. This paper presents a stochastic model for predicting the overhead introduced by the error handling algorithms of the JRM-protocol for various levels of network degeneration. To validate the model, a series of experiments were conducted. This paper compares those experiments with the predictions of the model.

The Design of a Reliable Multipeer Protocol for DVEs

We present the design and implementation of a reliable multipeer protocol (RMPP). This protocol is suitable for applications in the area of distributed virtual environments. RMPP is written in Java because this language has many interesting features for DVE‐builders. Motivation, protocol classification, design goals and the error recovery algorithm are discussed. Furthermore, some implementation issues are listed. This paper concludes by presenting two possible applications of the RMPP.