Database replication is the process of copying database records from one physical database to another, either of the same or different vendors. It generally takes the forms Master/Slave or Master/Master, and can be either eager/synchronous or lazy/asynchronous. In master/slave replication, updates and inserts are only permitted on the master copy, which is replicated to the slave(s). This is the most common and stable form. In master/master or multi-master replication, updates are permitted on any copy of the data, and changes are synchronized.
This category is for sites dealing with database replication in general, and for database replication software that operates with more than one RDBMS. Software that is specific to one particular vendor''s RDBMS should probably be submitted directly to that vendor''s category.