Recovery from Primary Database Failures

If a primary database fails and you are unable to recover all committed transactions, you must load the database to a previous state and follow a recovery procedure designed to restore consistency at the replicate sites.

Most database failures are recovered without losing any committed transactions. No special Replication Server recovery procedure is needed if the database recovers on restart—Replication Server performs a handshake with the database, ensuring that no transactions are lost or duplicated in the replication system.

Here are two possible scenarios for recovering from primary database failures: