REAL TIME DATA REPLICATION

摘要

PURPOSE: A real time data cloning is provided to clone a local database to a cloning database by using combination of synchronous cloning and asynchronous cloning of data. CONSTITUTION: A database transaction determines whether it is a transaction to update data of a database or adding a new data to a database. If it is a database transaction that updates data, the data is locally updated and is asynchronously cloned in a cloning database(430). If it is a database transaction adding a new data, the new data is locally added and is synchronously cloned to the cloning database.