Sumario:
1- Introducción a las bases de datos distribuidas
2- Replicación
3- Sincronización
4- Manejo de réplicas coordinadas
5- Presentación de un problema real
6- Implementación de una solución
7- Conclusiones

Vertical partitioning, in which attributes of a relation are
assigned to partitions, is aimed at improving database
performance. We extend previous research that is based on
a single relation to multi-relation database environment,
by including referential integrity constraints, access time

The term Federated Databases refers to the data integration of distributed, autonomous and heterogeneous databases. However, a federation can also include information systems, not only databases. At integrating data, several issues must be addressed. Here, we focus on the problem…

Sumario:
1- Introducción
2- Definiciones generales de bases de datos
3- Modelos y técnicas para el control de la concurrencia
4- MVCC: Control de Concurrencia Multiversión
5- Niveles de aislamiento
6- Aplicación Lectores/Escritores

The studies of Relational Data Base Management Systems and Databases constitute nowadays a main tren of investigation in large businesses and universities of the entire world. The creation of a data base engine keeps being a challenge since there are…

A data warehouse efficiently processes a given set of queries by utilizing the multiple materialized views. Owing to the constraint on space and maintenance cost, the materialization of all views is unfeasible. One of the critical decisions involved in the…