Downloads provided by UsageCounts
handle: 2117/97825
Basado en el Proyecto BLOOM (BarceLona Object- Oriented Model), se propone establecer una estrategia de procesamiento de la consulta global dentro del Gestor de Consultas Federado. Primero, se construye un árbol cuyos nodos inicialmente representan joins explícitos entre clases federadas y los cuales son descompuestos en joins implícitos entre clases en los esquemas componentes. Posteriormente, diferentes técnicas heurísticas optimizan el proceso de descomposición, las cuales generan uno o mas Planes de Ejecución (PE). Después, éstos PE son analizados para obtener el optimo. La función objetiva de esta estrategia es encontrar un plan de ejecución con el menor uso de recursos y el mejor tiempo de respuesta. Finalmente, la consolidación de resultados parciales se lleva a cabo manteniendo la respuesta federada en el nodo raíz.
Based on BLOOM (BarceLona Object-Oriented Model), we propose to establish a global query processing strategy in the Federated Query Manager. First, the developing mechanism constructs a tree, which has nodes that initially represent explicit joins between federated classes and that are decomposed, into implicit joins between classes in the Component Schemas. Consequently, different heuristic techniques are performed in order to optimise the decomposition process, which generate one or more Execution Plans (EP). After that, the EP are analysed to get the optimum. The objective function of this strategy is to choose an execution plan with the least total resource usage and the best response time. Finally, the consolidation of partial results is carried out maintaining the federated result in the root node.
BarceLona Object-Oriented Model, Optimization, EP, :Informàtica::Sistemes d'informació [Àrees temàtiques de la UPC], Federated query manager, Processing strategy, BLOOM, Àrees temàtiques de la UPC::Informàtica::Sistemes d'informació, Execution plans, Global query
BarceLona Object-Oriented Model, Optimization, EP, :Informàtica::Sistemes d'informació [Àrees temàtiques de la UPC], Federated query manager, Processing strategy, BLOOM, Àrees temàtiques de la UPC::Informàtica::Sistemes d'informació, Execution plans, Global query
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 0 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
| views | 39 | |
| downloads | 275 |

Views provided by UsageCounts
Downloads provided by UsageCounts