backup recovery
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Thread: backup recovery

  1. #1
    Join Date
    Jan 2000
    Location
    san jose
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    149
    oracle8i backup an recovery guide says that:

    if you use a backup control file, then oracle starts media
    recovery using the lowest of the following :the control file
    SCN and the lowest SCN in the datafile headers.

    does that means during the backup process, oracle will
    update control file as well? so i can use backup control file
    for complete recovery, and at the end of recovery, backup
    control file will be updated to the same as the current control
    file.

  2. #2
    Join Date
    Dec 2000
    Location
    Ljubljana, Slovenia
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    4,439
    Sure controlfile is updated during recovery if you use backup controlfile. And yes, you can use backup controlfile for full database recovery. But if you do so, you'll have to open the database with RESETLOGS option, which invalidates all previous archived logs. Saying this, it i selfunderstandable that you have to perform full backup as soon as possible after opening the database with resetlogs. Untill you do not perform a backup after resetlogs you are unarmed in the battlefield. That's why it is allways recommended to use the current controlfile for recovery whenever possible.
    Jurij Modic
    ASCII a stupid question, get a stupid ANSI
    24 hours in a day .... 24 beer in a case .... coincidence?

  3. #3
    Join Date
    Apr 2000
    Location
    Edison, NJ
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    759
    Yes, when the recovery completes, all dbf and controlfile(s) will have recovered to the max SCN found from the the arch log files.

  4. #4
    Join Date
    Jan 2000
    Location
    san jose
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    if backup control file was updated to the same as the
    current control file, why do i need to open database with
    resetlog option?

  5. #5
    Join Date
    Jan 2000
    Location
    san jose
    Posts
    149
    also does that mean if i have an old enough controlfile
    backup, i can incomplete recover to anytime afterwards.

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