What are consistent and inconsistent backups?

    Requires Free Membership to View

A consistent backup is one where the database has been shut down. This is also called a cold backup. The database is guaranteed to be in a consistent state because no one can possibly be using the database; it is down. An inconsistent backup is taken when the database is up and running. This is also called a hot backup. While the backup is being performed, the database can still undergo change. A datafile in your backup can have old transactions and new transactions. This means the datafile is not consistent with a single point in time. Oracle needs to use special mechanisms to handle this inconsistency. One mechanism Oracle uses is the archived redo logs so that transactions can be replayed during recovery.

This was first published in June 2006

There are Comments. Add yours.

 
TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: