Synchronous replication

The synchronous mode ensures that an update has been acknowledged by the secondary host before completing the update at the primary site. Thus, the primary site and the secondary site have the same data. If a disaster occurs on the primary site and its data is destroyed, the secondary site will already have an up-to-date copy of the data.

The synchronous mode of replication is most effective in application environments that have lower update rates but require all the hosts to always reflect the same data, or where a delay in updates between the primary and secondary hosts is not acceptable.