The Functioning of Oracle Replication

Oracle replication is the mechanism that is widely accepted by organizations to distribute, share, and consolidate their data. It also enables creating, syncing, and distributing data over multiple locations. This attribute facilitates sharing of data with users or vendors, and consolidates data from various sources, either locally or globally. Oracle replication also reduces the cost of data analytics with query overload through splitting up OLTP (Online Transaction Processing) and the generation of reports onto various systems.

Oracle replication helps users access information whenever needed. This is done through the creation of synchronized multiple copies of an Oracle database that can be used for testing, business reporting, backups for disaster recovery, and distributed data processing. The software also provides data in real-time so that businesses can enhance the performance of critical applications and databases and provide data across organizations for analytics and gaining vital business insights.

Oracle replication works broadly in two modes – Synchronous Replication and Asynchronous Replication.

In Synchronous replication, data is replicated concurrently to the primary and secondary areas. Hence the data replicated is identical and updated at both the source and the target. The possibility of errors is negligible. This method is ideal for disaster recovery of data or if a project requires zero data loss. The cost of executing this is more than the other.

Asynchronous replication also replicates data to primary and secondary areas, but here, there is a certain lag and slight delay when copying data. In this form of Oracle replication, the data is first written to the primary site and later committed to a secondary source instead of the two working concurrently. The data can be copied at pre-set intervals.  

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