CONFIGURE BACKUP OPTIMIZATION ON;

CONFIGURE BACKUP OPTIMIZATION ON;
above cmd only working on "sbt" type device or it is working also "disk".
plz. let me know. sir.
thanx in advance.

From the docs:
Requirements for Backup Optimization
Backup optimization is used when the following conditions are true:
The CONFIGURE BACKUP OPTIMIZATION ON command has been run to enable backup optimization.
You run BACKUP DATABASE, BACKUP ARCHIVELOG with ALL or LIKE options, or BACKUP BACKUPSET ALL.
Only one type of channel is allocated, that is, you do not mix channels of type DISK and sbt in the same backup command.
http://download-east.oracle.com/docs/cd/B19306_01/backup.102/b14191/rcmconc1008.htm#i1008304

Similar Messages

  • NEW 9I RMAN: BACKUP OPTIMIZATION AND RETENTION POLICIES

    제품 : RMAN
    작성날짜 : 2004-05-20
    NEW 9I RMAN: BACKUP OPTIMIZATION AND RETENTION POLICIES
    =======================================================
    오라클 9i RMAN 에서는 백업을 보다 효율적으로 할 수 있는 기능을 보강 했다.
    지금 소개할 "Retention Policies" 기능을 통해서 보다 효율적인 RMAN 백업
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    1. 백업 화일 최적화 방법 (Backup File Optimization)
    백업 화일 최적화란 백업에 소요되는 공간을 최소화 하는 전략이다. RMAN
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    이때 같은 화일이라고 판단하는 기준은 다음과 같다.
    * Datafile: 같은 DBID, checkpoint SCN, resetlogs SCN 과 time. 데이타 화일은
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    * Archived redo log: 같은 thread, sequence number, 그리고 같은 Resetlogs
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    * Backup Set: 같은 Backup Set recid 와 stamp.
    RMAN 이 백업을 수행하다가 위와 같은 조건의 화일이 이미 존재함을 확인하면
    이것은 건너뛰게 될 화일의 대상이다. 하지만 이때 바로 Skip 을 결정하지 않고
    정해진 Retention Policies 를 조사 한후에 Skip 여부를 결정 하게 된다.
    만일 백업 명령에 DELETE INPUT option 이 사용되면 RMAN 은 백업이 Skip
    되어도 화일을 지우게 된다.
    RMAN 은 모든 화일에 대한 백업이 Skip 되어도 에러메시지나 경고를 보내지
    않는다.
    그러나 만일 데이터 화일에 대한 백업이 recovery policy window 보다 오래
    된 것 이면 RMAN 은 새로운 백업 화일을 만들기 위해서 화일을 백업 하게 된다.
    Note:
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    이런 백업 최적화 정책을 사용하는 것에 신중을 기해야 한다.
    백업 최적화 를 사용하기 위해서는 CONFIGURE 명령을 사용한다. CONFIGURE
    명령은 명령 수행 이후에 이루어지는 모든 백업에 대해 적용이 된다.
    예:
    CONFIGURE BACKUP OPTIMIZATION ON; # default 는 OFF
    2. Backup Optimization에 Retention Policies 적용 하기
    Retention Policy 로 백업 최적화를 조절 할 수 있다. 그러나 retention policy를
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         a. Recovery Window 를 이용한 Backup Optimization
    만일 백업 최적화가 enable 되어 있고 Recovery Window 가 retention policy
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    예를 들면 다음과 같은 조건에서
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    o The recovery window is 7 days.
    o The most recent backup of tablespace tbs2 to tape is January 3.
    o Tablespace tbs2 is read-only.
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    이러한 작동 방식은 media manager 가 오래된 테잎을 제거 해도 되도록 한다.
    그렇지 않다면, media manager 는 1월 3일의 백업을 무한정 가지고 있게 된다.
    2월 21일에 tbs2 테이블 스페이스의 보다 최근의 백업을 만듦으로 써, RMAN 은
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    Tuesday Run BACKUP DATABASE. The archive tablespace is backed up.
    Wednesday Run BACKUP DATABASE. The archive tablespace is backed up.
    Thursday Run BACKUP DATABASE. The archive tablespace is backed up. Tuesday backup.
    Friday Run BACKUP DATABASE. n/a Tuesday backup.
    Saturday Run BACKUP DATABASE. n/a Tuesday backup.
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    Monday Run BACKUP DATABASE. The archive tablespace is backed up. Wednesday backup.
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    때문에 아카이브 테이블 스페이스를 또 다시 백업하게 된다. 이런 방식으로 백업
    사이클이 진행 된다.
    3. RETENTION POLICY NONE vs. DEFAULT
    주의 사항:
    'CONFIGURE RETENTION POLICY TO NONE' 과 'CONFIGURE RETENTION
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    'DELETE OBSOLETE' 명령은 RETENTION POLICY 기준으로 expire 된 백업을
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    보다 자세한 내용은 Oracle9i Recovery Manager User's Guide and
    Reference의 Backup Optimization 부분을 참고 하시기 바랍니다.
    --------------THE END----------------------------------------------

    Hi,
    Backup optimisation = +- do not copy empty space.
    So, when you issue your BACKUP statement, it backs up the datafile. dot. nothing more.
    In order to achieve what you're testing, look into TFM for BACKUP INCREMENTAL LEVEL x .
    Regards,
    Yoann.

  • "Backup optimization on" is not working for "backup database"

    Hi,
    I am using a windows environment and my database info is like this:
    Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
    PL/SQL Release 11.2.0.1.0 - Production
    CORE    11.2.0.1.0      Production
    TNS for 64-bit Windows: Version 11.2.0.1.0 - Production
    NLSRTL Version 11.2.0.1.0 - Productionnow, I change my configuration for backup optimization on and then make example tablespace offline and also make example datafile offline. After that I run 2 times "Backup Database" command but 2 backup has same size and have example tablespace too... Backup archivelog all is working bur backup database is not!
    according to this link it must not backup example datafile for second: http://download.oracle.com/docs/cd/E11882_01/backup.112/e10642/rcmconfb.htm#BRADV113
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    CONFIGURE BACKUP OPTIMIZATION ON;
    CONFIGURE DEFAULT DEVICE TYPE TO DISK;
    CONFIGURE CONTROLFILE AUTOBACKUP ON;
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    CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET;
    CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1;
    CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1;
    CONFIGURE MAXSETSIZE TO UNLIMITED; # default
    CONFIGURE ENCRYPTION FOR DATABASE OFF;
    CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
    CONFIGURE COMPRESSION ALGORITHM 'HIGH' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE;
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    CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'C:\APP\ABC\PRODUCT\11.2.0\DBHOME_1\DATABASE\SNCFORCL.ORA'; # default

    If you enable backup optimization, then the BACKUP command skips backing up files when the identical file has already been backed up to the specified device type.
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    -BACKUP DATABASE
    -BACKUP ARCHIVELOG with ALL or LIKE options
    -BACKUP BACKUPSET ALL
    refer,
    http://www.stanford.edu/dept/itss/docs/oracle/10gR2/backup.102/b14191/rcmconc1008.htm
    Thanks

  • Backup Optimization

    backup optimization is on ; i execute the following commands twice, and backup happens second time also with a seperate piece, why ? i did not even make any changes, oracle says for a datafile to be identical The data file must have the same DBID, checkpoint SCN, creation SCN, and RESETLOGS SCN and time as a data file in a backup. The data file must be
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    backup format '/u01/back/%U' datafile 4;
    backup format '/u01/back/%U' datafile 4;
    Edited by: 842638 on 29-Jul-2012 08:28

    in addition, if you command RMAN to backup datafile or tablespace exactly, RMAN definitely will back it up. if you run "BACUP DATABASE" command, then you will see that "skipping datafile X" line during backup. (my previos message is still valid, REDUNDANCY condition must be provided)
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    Edited by: Mustafa Kalaycı on Jul 29, 2012 8:41 AM

  • RMAN : BACKUP OPTIMIZATION ON

    Hi All,
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    Regards,
    Prabhu.

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    ofcourse the best reference is here

  • Backup Optimization vs redundancy of 3.

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    Arc_8
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    Thank you.
    What you say makes sense. As my one friend said to me ,  if you planning on being able to restore backup 3's archvied files and you dont have your backup duplexed, then you cannot restore backup 3 archived files.  So,  if optimization is turned on,  duplex to 2 tapes.
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  • Rman backup optimization question

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    Thanks for the quick response!
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  • Configuring Backups in Enterprise Manager 10.2.0.2.0

    Hello,
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  • 11g RMAN UNDO backup optimization

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    Piece Name: /home/oracle/flash_recovery_area/11GR1/backupset/2010_06_10/o1_mf_nnndf_TAG20100610T142437_611ctr1f_.bkp
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    BP Key: 11 Status: AVAILABLE Compressed: NO Tag: TAG20100610T142541
    Piece Name: /home/oracle/product/11/Db_1/dbs/after commit.backup
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    6 Full 577705 10-JUN-10 /home/oracle/oradata/11GR1/datafile/undotbs2.dbf
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    SQL> select count(*) from testundo;
    COUNT(*)
    100000
    SQL> delete from testundo;
    100000 rows deleted.
    SQL> commit;
    Commit complete.
    SQL> insert into testundo values(1);
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    ===================
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    BP Key: 13 Status: AVAILABLE Compressed: NO Tag: TAG20100610T143359
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    6 Full 578410 10-JUN-10 /home/oracle/oradata/11GR1/datafile/undotbs2.dbf
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    Fixed Size 1300156 bytes
    Variable Size 352323908 bytes
    Database Buffers 33554432 bytes
    Redo Buffers 6197248 bytes
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    14 Full *600.00K* DISK 00:00:02 10-JUN-10
    BP Key: 14 Status: AVAILABLE Compressed: NO Tag: TAG20100610T152843
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    6 Full 580347 10-JUN-10 /home/oracle/oradata/11GR1/datafile/undotbs2.dbf
    Thanks in advance
    Turkel

    Hi Turkel,
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    As it seems you do a test update and proceed with backups on:
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    - 14:25:41 (-> 25M)
    - 14:33:59 (-> 11M)
    - 15:28:43 (-> 600K)
    The first two backups probably are still within the undo retention period for the update.
    The third backup shows a partly empty undo (is your setting 900?).
    The last falls outside the retention period for the update resulting in the small backup size.
    Regards,
    Tycho

  • How to configuration Maintenance Optimizer in Solution Manager 4.0?

    Hi All,
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    If any one having the document for same then please give me.
    My mail id is : - <email address removed by moderator>
    Thanks a lot,
    Harshal

    Hello Harshal,
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