redo backup

Can any expert explain how to backup redo log files..
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Chakravarthi AyyalaDatabase AdministratorCommented:
i do not backup online redo logs.
but, as you asked the question:
  - if you are performing a cold backup, copy the online redo logs.
  - if you are performing an online backup and database in archive mode, you archive log the current online redo log and take the backup of the archived redo logs.
slightwv (䄆 Netminder) Commented:
To confirm/add to what ReliableDBA posted, I'll refer you to the online docs.  Just about everything you'll ever need is typically explained in detail in the docs:

Database Backup and Recovery Concepts

Consistent and Inconsistent Backups
A backup is either consistent or inconsistent. To make a consistent backup, your database must have been shut down cleanly and remain closed for the duration of the backup. All committed changes in the online redo log files are written to the data files during the shut down process, so the data files are in a transaction-consistent state. When you restore your data files from a consistent backup, you can open the database immediately.

If the database is in ARCHIVELOG mode, then you can make inconsistent backups that are recoverable using archived redo log files. Open database backups are inconsistent because the online redo log files contain changes not yet applied to the data files. The online redo log files must be archived and then backed up with the data files to ensure recoverability.


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
to add to the other member's comments, RMAN never takes backup of redo logs, but will only take backup of archived redo logs when asked.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Oracle Database

From novice to tech pro — start learning today.