The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The growing number of computers accessible through a network, such as the Internet, has meant that these computers can be collectively employed to solve complex problems. Since the networks that connect such machines are distributed, many attempts have been made to create an infrastructure for distributing large scale applications across regional and national boundaries, to enable nation-scale or...
The Cactus software is representative for a whole class of scientific applications; typically those that are tightly coupled, have regular space decomposition, and huge memory and processor time requirements. Cactus proved to be a valuable tool for astrophysicists, who first initiated its development. However, today’s fastest supercomputers are not powerful enough to perform realistically large astrophysics...
Cactus is an open source problem solving environment designed for scientists and engineers. Its modular structure facilitates parallel computation across different architectures and collaborative code development between different groups. Here we detail some of the various Grid Tools which have been developed around Cactus, and describe Grid experiments which have been performed to test their application.
This paper describes the result of the UNICORE (BMBF grant 01 IR 703) project, the goals and the initial results of the follow-on project UNICORE Plus (BMBF grant 01 IR 001). It outlines the original goals of the German funded project to provide a seamless batch interface for German HPC centers and its evolution toward a Grid Computing Environment. The focus is on technical results, like abstraction...
With the availability of Computational Grids, new kinds of applications that will soon emerge will raise the problem of how to program them on such computing systems. In this paper, we advocate a programming model that is based on a combination of parallel and distributed programming models. Compared to previous approaches, this work aims at bringing SPMD programming into CORBA. For example, we want...
In this article we present CORBA Lightweight Components, CORBA- $$ \mathcal{L}\mathcal{C} $$ , a new network-centered reflective component model which allows building distributed applications assembling binary independent components spread on the network. It provides a peer network view in which the component dependencies are managed automatically to perform an intelligent application run-time...
We describe the design and the implementation in Java and Jini of a Computational Community, which supports the federation of resources from different organisations. Resources from the local Administrative Domain are published in a Jini space to form a Computational Community. Different access control policies can be applied to the same resource in different Computational Communities. We show how...
Causal message logging spread recovery information around the network in which the processes execute. This is an attractive property for wide area networks: it can be used to replicate processes that are otherwise inaccessible due to network partitions. However, current causal message logging protocols do not scale to thousands of processes. We describe the Hierarchical Causal Logging Protocol (HCML)...
GRM was originally designed and implemented as part of the P-GRADE graphical parallel program development environment running on supercomputers and clusters. In the framework of the biggest European Grid project, the DataGrid we investigated the possibility of transforming GRM to a grid application monitoring infrastructure. This paper presents the architectural redesign of GRM to become a standalone...
A new methodology is presented in this paper for resource management in a metacomputing environment using a hierarchy of homogeneous agents that has the capability of service discovery. The PACE [6] tools are used to provide quantitative data concerning the performance of sophisticated applications running on local high performance resources. At metacomputing level, an agent hierarchy is used to model...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.