Retrieve by using the backup control file

Hello

I was reading a book called Pro Oracle Database Administration by Darl Kuhn. There, under the theme of "The valuation of the loss of all control files", noted that all data files and control files are restored from a backup, because if we do not restore the data files the RCS in control files would be lower than the data in these scenarios files. Since online redo logs and archived newspapers is applied to the data files to roll forward in a current consistent state and does not roll forward to a control file.

It is then mentioned to use 'recover the database by using the backup control file' then apply the logs (archive and redo if necessary).

However I personally tested this script in a test environment and to bring all the backup control file could issue the same command as above and recover the database.

My question is I know again and archives are applied only to the data files. So how does the control file are synchronized back when we do not restore the backup data files.

Thank you

If we do not restore the data files, the RCS in control files would be lower than the data files. Since online redo logs and archived newspapers is applied to the data files to roll forward in a current consistent state and does not roll forward to a control file.

It would be incorrect you have determined. You can only restore the control files. You can manually create a control file and always do the restore.

My question is I know again and archives are applied only to the data files. So how does the control file are synchronized back when we do not restore the backup data files.

The control file is updated as well.

See you soon,.
Brian

Tags: Database

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