Víctor Robles

A new formalism for dynamic reconfiguration of data servers in a cluster

The use of parallel file systems constitutes a high-performance solution to the problem known as I/O crisis in parallel or distributed environments. In the last years, clusters have become one of the most cheap and flexible frameworks for the deployment of parallel and distributed applications. Both parallel file systems and clusters have been successfully used in several scenarios, where it is possible to share and access data in an efficient way. In fact, clusters provide a huge number of advantages to this kind of systems, the wide availability of tools integrated with them being one of the most important. Nevertheless, clusters and, in general, high-availability distributed systems are characterized to be dynamically modified. Operations such as the addition or elimination of nodes are typical in a cluster environment. Therefore, it is necessary to use new approaches for the dynamic reconfiguration of the nodes that belong to a cluster. This paper describes a mathematical formalism for achieving high-performance and dynamic reconfiguration of data-based clusters with service maintenance.

Scientific Applications of Grid Computing

Data-Based Applications.- to OGSA-DAI Services.- Using OGSA-DQP to Support Scientific Applications for the Grid.- Mobile Agent-Based Service Provision in Distributed Data Archives.- A Proxy Service for the xrootd Data Server.- A Flexible Two-Level I/O Architecture for Grids.- Data Driven Infrastructure and Policy Selection to Enhance Scientific Applications in Grid.- BioApplications.- Modelling a Protein Structure Comparison Application on the Grid Using PROTEUS.- Grid Services Complemented by Domain Ontology Supporting Biomedical Community.- Applications Architecture, Frameworks and Models.- A Generic Architecture for Sensor Data Integration with the Grid.- Embarrassingly Distributed and Master-Worker Paradigms on the Grid.- A Framework for the Design and Reuse of Grid Workflows.- Towards Peer-to-Peer Access Grid.- A Service Oriented Architecture for Integration of Fault Diagnostics.- GAM: A Grid Awareness Model for Grid Environments.- Accounting and Market-Based Architecture.- Grid Accounting Service Infrastructure for Service-Oriented Grid Computing Systems.- Mercatus: A Toolkit for the Simulation of Market-Based Resource Allocation Protocols in Grids.- Resource and Information Management in Grid.- A Resource Monitoring and Management Middleware Infrastructure for Semantic Resource Grid.- A Service-Oriented Framework for Traffic Information Grid.