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Optimize Oracle backup time duration

Oracle Tips by Burleson Consulting

Whether you are doing an Oracle hot backup or a cold backup, it's important to minimize the time required to execute the backups.


Use parallel backup threads - The downtime for any Oracle (hot or cold) depends on the speed of your disks and the disk-to-tape ratio.  For example, if I have 50 disks and 50 tape devices, you can do a full backup of a 500 gig database in less than 15 minutes!  Almost all Oracle backup utilities (RMAN) allow parallel backup threads.


Low-DML scheduling - For hot backups, it's important to schedule the backup during low-DML times to minimize the size of the logs and therefore speed-up recovery time.


Investigate Incremental Backups – Incremental backups greatly reduce the elapsed time for Oracle backups, but the mechanisms can be complex.


Use replication – Replication with Oracle Streams can provide multiple "live" Oracle databases, and if you use TAF, one database can be taken offline for a cold backup without impacting database availability.

If you like Oracle tuning, see the book "Oracle Tuning: The Definitive Reference", with 950 pages of tuning tips and scripts. 

You can buy it direct from the publisher for 30%-off and get instant access to the code depot of Oracle tuning scripts.



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