The Research And Application Of Data Replication In Distributed Database System

This paper analyses the base theory of distributed database system and data replication technic in distributed environment, and deeply studies a new data replication model based on modified timestamp of data record and designs the data replication solution.As the development of database technic and network technic, distributed database system has been developed maturely not only on theory but on application.With the push of distribution application of database, the data replication technic is widely used because of it's advantages and becomes a hotspot in the field of database technic research.Data replication publishes the publication which is defined by publishing database to other subscribing database, which provides a quick and efficient method to release information in distribution environment. The remote users can take distributed operation on the replicas, then cut down the load of network and center database server. The result that user has operated on the replicas may pull back to the center database, which provides an available means for data collection and database backup.This paper mainly analyses the theory of distributed database system and detailedly discusses the base concept, system structure, schema structure and transaction management of distributed database system, studies the data replication realization in traditional relation database and the data conflict solution in replication procedure. We deeply study the modules of data replication and the data conflict solution methods, put forward a data replication method based on modified timestamps of data records and design the data replication solution in an application model on read-only data.