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Oracle low downtime recovery tips

Oracle Database Tips by Donald BurlesonMay 25, 2016

Question: What do I do to minimize the downtime when performing a database recovery?  I have a very large database and we cannot be down for a long period of time when restoring a bas file and rolling forward.  What are some of the low downtime options for recovering an Oracle database?

Answer:  The best way to minimize downtime, is to never be in a position to recover the database.  If your downtime costs exceed $100,000 per minute, then triple mirroring your disks is a great way to prevent data loss at the disk level (although you are still at-risk from logical corruption, but this is quite rare). 

Also, read my important notes on Oracle failover approaches to recovery.

That, combined with a server that has redundant RAM and CPU, and you are fully protected against a recovery, all at the hardware level.

Other tools and techniques to use to minimize downtime for a recovery include:

  • Frequent full hot backups:  This approach minimizes the time to apply archived redo logs when performing a database recovery.

  • Standby database:  You can use Data Guard, Streams, or GoldenGate replication to make a current standby database for a fast failover.
  • RAC:  RAC only protects you against instance failure, and you still have a common database (and data files) to manage.
  • Fast Recovery Area (FRA):  Oracle has the flash recovery area for fast recoveries.


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