RMAN Incremental Backups to Refresh Standby Database
Description to standby: A standby database is a transactionally consistent replica of the primary database, designed to ensure continuity and data integrity in the event of disasters or data corruption. It allows the primary Oracle database to remain operational even during planned or unplanned outages. If the primary database becomes unavailable, Data Guard can seamlessly promote the standby database to the primary role, minimizing downtime. Additionally, the performance of the primary database can be optimized by redirecting resource-intensive tasks such as backups and reporting to the standby system. Therefore, keeping the standby database synchronized with the primary database is always advantageous. A standby database might lag behind the primary for various reasons like: Unavailability of or insufficient network bandwidth between primary and standby database Unavailability of Standby database Corruption / Accidental deletion of Archive Redo Data on primary CHECK THE SEQUENCE IN BOTH NODES: PRIMARY: SQL> select thread#, max(sequence#) “Last Primary Seq Generated” from v$archived_log val, v$database vdb where val.resetlogs_change# = vdb.resetlogs_change# group by thread# order by 1; THREAD# Last Primary Seq Generated ———- ————————– 1 556 STANDBY:…
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