Made available in DSpace on 2014-12-17T14:55:02Z (GMT). No. of bitstreams: 1 ViniciusFO.pdf: 3863116 bytes, checksum: 9dad12d980623a082efb3927bc75ff45 (MD5) Previous issue date: 2006-05-19 / This graduate thesis proposes a model to asynchronously replicate heterogeneous databases. This model singularly combines -in a systematic way and in a single project -different concepts, techniques and paradigms related to the areas of database replication and management of heterogeneous databases. One of the main advantages of the replication is to allow applications to continue to process information, during time intervals when they are off the network and to trigger the database synchronization, as soon as the network connection is reestablished. Therefore, the model introduces a communication and update protocol that takes in consideration the environment of asynchronous characteristics used. As part of the work, a tool was developed in Java language, based on the model s premises in order to process, test, simulate and validate the proposed model / Esta disserta??o prop?e um modelo para replicar de forma ass?ncrona bases de dados heterog?neas. A principal caracter?stica do modelo ? ter reunido, de forma sistematizada e em um s? projeto, diversos conceitos, t?cnicas e paradigmas relacionados ?s ?reas de replica??o de banco de dados e gerenciamento de bases de dados heterog?neas. Uma das principais vantagens da replica??o ? permitir aos aplicativos continuar processando informa??es durante intervalos de tempo em que se encontram desconectados da rede, garantindo o disparo de procedimentos de sincroniza??o entre as bases de dados, t?o logo a conex?o venha a se restabelecer. Faz parte do modelo, portanto, um protocolo de comunica??o e atualiza??o entre bases de dados replicadas, que leva em conta o ambiente de caracter?stica ass?ncrona onde ser? utilizado. Por fim, foi desenvolvida, com o objetivo de realizar testes e valida??es, uma ferramenta na linguagem Java baseada nas premissas do modelo