Backup ????
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Thread: Backup ????

  1. #1
    Join Date
    Feb 2003
    Posts
    69

    Backup ????

    Hi all,

    I have small doubt please clear it off...

    While taking hot backups, where the data will be write ?

    It writes in DB Cache,Redo Buffer cache then Redo log files. Is the process correct ? In addition, it writes changed blocks of data files(which is in backup mode) to redo log files instead of just row information. is it correct ? then

    Where store the old value and new value ?

    Need clarification...please....
    HTML

  2. #2
    Join Date
    Nov 2002
    Location
    New Delhi, INDIA
    Posts
    1,796
    Old value in the Undo and New value in the redo. Whats the confusion?

    Everything works the same except that additional data block snapshots are written to the redo to fix the fractures caused by the data modification while the backup is going on. Read the backup concepts.

    HTH
    Amar
    "There is a difference between knowing the path and walking the path."

    Amar's Blog  Get Firefox!

  3. #3
    Join Date
    Feb 2003
    Posts
    69
    Thanks for your response. can i have your mail id please.
    HTML

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