Deleting backup Sets from RMAN
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Thread: Deleting backup Sets from RMAN

  1. #1
    Join Date
    Nov 2000
    Location
    Birmingham, UK
    Posts
    360
    I've got an RMAN repository at 8.0.5 (UNIX) and we've got some databases registered with the repostory that no longer exist. Can anyone shed any light on how I get rid of the backupsets for these databases from the repository? (no control files exist)

  2. #2
    Join Date
    Jan 2002
    Posts
    94
    Do you use a catalog?

    If yes, you can delete the datafiles of the backupset on OS level an than run the following commands on RMAN:

    For this operations a connection to the catalog is necessary.

    ALLOCATE CHANNEL FOR MAINTENANCE TYPE DISK;
    CROSSCHECK BACKUP;
    DELETE EXPIRED BACKUP;
    RELEASE CHANNEL;
    LIST BACKUPS; (

    If somebody knows a way which is more clean, please let me know it.

    Chris

  3. #3
    Join Date
    Sep 2000
    Posts
    19
    This is from the Oracle documentation:

    To unregister a database:

    Start RMAN and connect to your target database. Note down the DBID value that is displayed when you use RMAN to connect to your target database. For example, enter:

    % rman target sys/change_on_install@prod1 nocatalog


    RMAN-06005: connected to target database: RMAN (DBID=1231209694)


    List the copies and backup sets recorded in the control file (see "Generating Lists"). For example, enter:

    RMAN> list backup of database;
    RMAN-03022: compiling command: list

    List of Backup Sets
    Key Recid Stamp LV Set Stamp Set Count Completion Time
    ------- ---------- ---------- -- ---------- ---------- ----------------------
    989 1 368895909 0 368895908 1 23-JUN-99

    List of Backup Pieces
    Key Pc# Cp# Status Completion Time Piece Name
    ------- --- --- ----------- ---------------------- ------------------------
    990 1 1 AVAILABLE 23-JUN-99 /vobs/oracle/dbs/01avppt4_1_1

    List of Datafiles Included
    File Name LV Type Ckp SCN Ckp Time
    ---- ------------------------------------- -- ---- ---------- -------------
    2 /vobs/oracle/dbs/tbs_02.f 0 Full 34968 23-JUN-99

    Issue change ... delete statements to delete all backups from the operating system (see "Deleting Backups and Copies and Updating Their Status in the RMAN Repository"). For example, enter:

    allocate channel for maintenance type disk;
    change backupset 989 delete;

    RMAN-03022: compiling command: change
    RMAN-08073: deleted backup piece
    RMAN-08517: backup piece handle=/vobs/oracle/dbs/01avppt4_1_1 recid=1 stamp=368895908
    RMAN-03023: executing command: partial resync
    RMAN-08003: starting partial resync of recovery catalog
    RMAN-08005: partial resync complete

    Execute another list command to confirm that RMAN removed all backups:

    list backup;
    RMAN-03022: compiling command: list

    Use SQL*Plus to connect to your recovery catalog database and execute the following query in the recovery catalog to find the correct row of the DB table, setting DB_ID equal to the value you obtained from step 1. For example, enter:

    SQL> SELECT db_key, db_id FROM db WHERE db_id = 1231209694;

    This query should return exactly one row.

    DB_KEY DB_ID
    ---------- ----------
    1 1237603294
    1 row selected.

    While still connected to the recovery catalog, enter the following, where DB_KEY and DB_ID are the corresponding columns from the row you got from the query in step 5:

    SQL> EXECUTE dbms_rcvcat.unregisterdatabase(db_key, db_id)

    For example, enter:

    SQL> EXECUTE dbms_rcvcat.unregisterdatabase(1 , 1237603294)

    --------------------------------------------------------------------------------
    Note:
    The DBMS_RCVCAT.UNREGISTERDATABASE package works on Oracle release 8.0 and higher.

    --------------------------------------------------------------------------------


    If your databases have been blown away I don't know how you get the DBID, but there has to be a way to get that out of the catalog.

    hope this helps,

    Frank

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