146 research outputs found
Component metadata management and publication for the grid
Get PDFThere is growing attention to component-oriented software design of Grid applications. Within this framework, applications are built by assembling together independently developed software components. Two main approaches are commonly used to manage, develop and publish software components: one is based on an Interface Description Language (IDL); the other is typical, for instance, of Java and is based on introspection and design conventions. In this paper, we compare them and we propose a third approach that merges the flexibility and fast learning curve of the latter, with the rigor of the former. Our proposal is meant to help the transition towards more modern tools, which is required to develop versatile Grid applications. © 2005 IEEE
How to run scientific applications over web services
No full textToday, the task of running and coordinating a scientific application across several administrative domains is extremely complex. As an example, the most popular tool for scientific applications, MPI, is not designed to address firewall limitations or data heterogeneity, even if its extensions deal with some of these problems. In this paper, we design a new approach to run a scientific application in a distributed environment, when data and computing power are scattered across the Web: Web Services can be used to tunnel computation and data migration. We show that a very simple mapping exists between MPI primitives and the Web Service infrastructure. We are currently designing a framework, based on Web Services, which will implement the main MPI primitives: this way an MPI application could be run on any platform supporting Web Services. © 2005 IEEE
Using Web Services to Run Distributed Numerical Applications
No full textMPI is a de facto standard for high performance numerical applications on parallel machines it is available, in a variety of implementations, for a range of architectures, ranging from supercomputers to clusters of workstations. Nonetheless, with the growing demand for distributed, heterogeneous and Grid computing, developers are hitting some of its limitations e.g. security is not addressed, and geographically distributed machines are difficult to connect. In this work, we give an example of a parallel application, implemented with the use of Web Services. Web Services represent an emerging standard to offer computational services over the Internet. While this solution does not reach the same performance of MPI, it offers a series of advantages high availability, rapid design, extreme heterogeneity. © Springer-Verlag 2004
Collaborative ranking of grid-enabled workflow service providers
No full textService Oriented Architecture (SOA) and Grid computing are very hot research topics, nowadays. While Grid computing is aimed at sharing dynamically heterogeneous resources, SOAs is a meta-architectural style that enable business flexibility in an interoperable way. There is a growing consensus that SOA(s) and Grid(s) might be beneficial to each other. In Grid-based SOAs a central role is played by tools for the publishing/discovering of services (resources). This work presents SPRanker (Service Provider Ranker): a service discovery tool that is able to retrieve providers from partially specified service descriptions. It ranks providers found on the basis of an Information Retrieval-based score formula that takes into account judgments expressed collaboratively bv nast service users
Recent Advances in Parallel Virtual Machine (PVM) and Message Passing Interface (MPI) - 10th European PVM/MPI Users' Group Meeting, Venice, Italy, September 29 - October 2, 2003, Proceedings
No full textA tool to execute ASSIST applications on globus-based grids
No full textThis article describes ASSISTCONF, a graphical user interface designed to execute ASSIST applications on Globus-based Grids. ASSIST is a new programming environment for the development of parallel and distributed high-performance applications. ASSISTCONF hides to the programmer the structure of the grid used and integrates the ASSIST Run Time System with the Globus middleware. The first version of ASSISTCONF was designed to manually configure an ASSIST application and to establish a mapping between the application components and the machines selected for its execution on the Grid. The new ASSISTCONF functionalities, such as authentication and execution authorization on the resources selected in the application mapping phase, and deployment on the selected resources of the ASSIST Run Time Support, the executable application components, and the application input data, allow the semi-automatic execution of an ASSIST application on a such environment
Toward GRIDLE: A Way to Build Grid Applications Searching Through an Ecosystem of Components
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