Salvatore Vadacca

Advanced grid database management with the GRelC data access service

Many data grid applications manage and process huge datasets distributed across multiple grid nodes and stored into heterogeneous databases; e-Science projects need to access widespread databases within a computational grid environment, through a set of secure, interoperable and efficient data grid services. In the data grid management area several projects aims at addressing these issues providing different solutions and proposing a set of data access and integration/federation services. In this paper we present the GRelC Data Access, a WS-I based data grid access service developed by SPACI Consortium and the University of Salento. Its architectural design is discussed and experimental results related to an European testbed are also reported.

GRelC DAS: A Grid-DB Access Service for gLite Based Production Grids

Production grids such as EGEE allow scientists and researchers using aggregated computational power and storage resources. Many users/virtual organizations (VOs) e.g., bioinformatics, astrophysics, etc., need relational databases for their experiments. However, the EGEE middleware (gLite) lacks ad hoc software, and other available solutions are not currently suitable for this purpose within a gLite based environment. We present the GRelC data access service, a data grid access service developed by the GRelC team (SPACI Consortium and University of Salento) showing up how this component could be integrated within the EGEE grid. Deployment on the GILDA testbed as well as porting issues on gLite middleware are also proposed.

A GRelC based Data Grid Management Environment

Data grid management systems are becoming increasingly important in the context of the recently adopted service oriented science paradigm. The Grid Relational Catalog (GRelC) project is working towards ubiquitous, integrated, seamless and comprehensive data grid management solutions to fully address application specific requirements. This paper describes a GRelC based environment for bioinformatics and its underlying data grid services allowing scientific users (by means of a customized grid portal) to manage data, handle, share and publish metadata, perform search and discovery activities, etc.

GReIC data gather service: a step towards P2P production grids

Current production Grids involve hundreds of sites and thousands of machines. In this context, P2P solutions are well suited - with regard to existing centralized and hierarchical approaches - to implement highly scalable, decentralized, reliable and manageable grid services. In this paper we describe the GReIC Data Gather Service from an architectural and technological point of view. This service has been developed within the Grid Relational Catalog (GReIC) Project, at the Center for Advanced Computational Technologies (CACT) of the University of Lecce. The GReIC Data Gather architecture aims at integrating transparently and securely distributed and geographically spread heterogeneous grid data sources through Data Gather Service nodes connected in a P2P fashion.

Advances in the GRelC Data Access Service

In a growing number of scientific disciplines, large data collections are emerging as important community resources. Data and metadata management exploiting the data grid paradigm is becoming more and more important as the number of involved data sources is continuously increasing and decentralizing. Efficient grid data access services are perceived as mandatory components for data management. In the grid data management area the GRelC Project has been addressing efficiency, transparency, interoperability and security issues, providing grid enabled solutions and proposing a set of data access and integration/federation services. In this paper we present the advances related to the GRelC Data Access, highlighting differences and innovations w.r.t. previous work. Basic foundations about the grid-enabled queries provided by the GRelC DAS and experimental results related to a bioinformatics international testbed on the GILDA t-Infrastructure are also reported and discussed.

Data issues at the Euro-Mediterranean Centre for Climate Change

Climate Change research is even more becoming a data intensive and oriented scientific activity. Petabytes of climate data, big collections of datasets are continuously produced, delivered, accessed, processed by scientists and researchers at multiple sites at an international level. This work presents the Euro-Mediterranean Centre for Climate Change (CMCC) initiative, discussing data and metadata issues and dealing with both architectural and infrastructural aspects concerning the adopted grid enabled solution. A complete overview of the grid services deployed at the Centre is presented as well as the client side support (CMCC data portal and monitoring dashboard).

iGRelC: A Dashboard Implementation for Grid Environments

Nowadays production grids such as EGEE, Teragrid, DEISA adopt several tools in order to monitor jobs, check the status of the grid, manage accounting information, etc. Anyway, from the end-user perspective, monitoring the global status of the grid taking into account machines, networks, services, databases, job, etc. is not straightforward, uniform, and tightly coupled. What we present in this paper is the iGRelC dashboard, an integrated approach able to retrieve, process and display information coming from different data sources (both relational and non-relational) and published in grid by heterogeneous systems and services.

The GRelC Portal: A Ubiquitous and Seamless Way to Manage Grid Databases

Grid portals are web gateways aiming at providing a pervasive and ubiquitous access in grid to computational resources, tools, instruments, datasets and metadata via standard Web protocols. Moreover, they provide enhanced problem solving capabilities to deal with modern, large scale scientific and engineering problems. Data grid management systems are becoming increasingly important in the context of the recently adopted service oriented paradigm. The grid relational catalog (GRelC) project is working towards ubiquitous, integrated, seamless and comprehensive grid database management solutions. This paper describes the GRelC Portal, a web based grid-enabled solution for grid-database access, management and integration built on top of the GRelC Data Access Service.

Euro-Mediterranean Centre for Climate Change Data Grid

Earth Science is strongly becoming a data intensive and oriented activity. Petabytes of data, big collections, huge datasets are continuously produced, managed and stored as well as accessed, transferred and analyzed by several scientists and researchers at multiple sites.