RMAN incremental long

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• RMAN incremental

  Dear,
  Hello
  Sorry if I can't write English well,
  my (datafiles) size of the database is about 1.4 GB.
  I take level 0 RMAN incremental backup and size of output file is about 1.1 GB
  After that, I put on the record of a table (by change of test)
  and I take incremental backup of level 1 and output file size is about 1.1 GB (level 0)
  but I think that the level 1 just changed the block and must be lower than level 0.
  
  RMAN > backup database incremental level 0 FORMAT 'd:\rm\L0_%d_t%t_s%s_p%p ';
  
  RMAN > backup database incremental level 1 FORMAT "d:\rm\L1_%d_t%t_s%s_p%p".
  
  
  Why the size for levels 0 and 1 is same?
  
  Thank you and best regards
  Hassan

  In theory, the backup of the L1 must be smaller because he must capture only changed blocks (it is not a requirement that you create a BCT - one file BCT file helps speed up the incremental backup, its presence or absence has nothing to do with the size of the incremental backup of L1).

  You must determine if there were other, several changes to the database that have also taken place between two backups.

  Hemant K Collette

• Roll forward standby with RMAN incremental backup when used DG broker

  Hello
  
  I'm about to use the process defined in the note: steps to roll forward a database ensures the RMAN incremental backup using during primaries and Eve are in the file [836986.1 ID] ASM system. I'm on 11.1.0.7.
  
  However, it does not mention the DataGuard broker.
  Did someone played this process when you use the broker.
  The broker he manages properly?
  Does it matter if the broker is upwards or downwards during the physical recovery of standby or replacement of control file?
  Should the broker configuration be re-created?
  
  Thank you.

  user11993454 wrote:
  Hello

  I'm about to use the process defined in the note: steps to roll forward a database ensures the RMAN incremental backup using during primaries and Eve are in the file [836986.1 ID] ASM system. I'm on 11.1.0.7.

  However, it does not mention the DataGuard broker.
  Did someone played this process when you use the broker.
  The broker he manages properly?
  Does it matter if the broker is upwards or downwards during the physical recovery of standby or replacement of control file?
  Should the broker configuration be re-created?

  Thank you.

  (1) disable the broker
  (2) perform the Roll forard SNA.
  (3) select the broker

• RMAN incremental backup

  Hi all

  I have a question, I am on RHEL-6 / Oracle 11 GR 2.

  After taking the backup of level 0 (RMAN), if I plan tale level1 backup then how oracle knows that they are the backup piece is considered a level 1 backup.

  I mean, that's how oracle knows that these are the blocks that had to be backeup.

  Kind regards.

  Please refer to the https://docs.oracle.com/cd/B19306_01/backup.102/b14192/bkup004.htm documentation

  Article: 4.4.1 Alogrithm incremental backup

  -Jonathan Rolland

• RMAN takes longer than usual to the database backup cars.

  Hi all

  I have a database of CARS 2 nodes (11.2.0.3) using ASM on OUL5x64 (DB1/DB2) the backup script was running on DB2 for the past 3 years without problem.

  backup with compress is 80 GB Sunday.

  level Inc 1 day = 20 to 30 GB)

  I just added 2 other nodes to this CAR, now there DB1, DB2, DB3, DB4

  moved the backup to DB4 script and set up all of the environments for this work.

  The first 2 days, it did increase normal level 1 backup around time (20-30 GB) between (1 h 30 min)

  but on Thursday which is always increase of LEVEL 1, it took 8 hours to do the job.  and when checking the size

  the backup, the size was 255 GB level 1 (s/n 20/30 GB) and today it did the same.

  Please give suggestions as why backup is so huge.

  Thank you.

  Here's the script.

  RMAN target / < < EOF

  echo setting

  CONFIGURE CONTROLFILE AUTOBACKUP FORMAT for DEVICE TYPE DISK TO ' / u02/%F';

  Run {}

  allocate channels d1 type disk maxpiecesize 5 g;

  allocate channels d2 type disk maxpiecesize 5 g;

  Compressed backupset backup

  format ' / d01/pr1/pr1_%s_%t_%p.dbf'

  extra strength 1 cumulative

  Skip inaccessible

  tag hot_db_bk_level1

  filesperset 4

  (data include current controlfile);

  # sql 'alter system archive log current';

  #Backup all archive logs

  Compressed backupset backup

  format ' / d01/pr1/pr0_%s_%t_%p.arc'

  Ark of the tag

  filesperset 4

  (archivelog all delete all entries).

  }

  Hi all

  After you resolve the problem, the support of Oracle pointed out that

  I hit the limit in this note:

  How many incremental backups can be taken when the OWA is enabled? ( Doc ID 452455.1 )

  the default value

  _bct_bitmaps_per_file = 8

  in my case, I ran more than 8 times in the week. sous-séquence then run don't use BTC (block_change_tracking)

  After running a backup full again, backup works like it suppose to.

  Thanks for the replies.

  Kind regards

• Before physical deployment standby with RMAN incremental backups.

  This method is available in 10g:

  http://Web.Stanford.edu/dept/ITSS/docs/Oracle/10gR2/server.102/b14239/scenarios.htm#CIHIAADC

  For 11g:

  http://docs.Oracle.com/CD/E11882_01/server.112/e41134/RMAN.htm#SBYDB00759

  For 12 c:

  http://docs.Oracle.com/database/121/BRADV/rcmadvre.htm#BRADV685

  According to dosc 10 g, the scenario is simple:

  1. create an incremental backup to SNA required on primary and copy it in standby mode

  2 save the backup in sleep mode and perform a recovery

  11 g dosc, we must recreate the standby control file and update the file names before performing the recovery.

  12 c introduces the new method - recovery on network, but again, we must recreate and standby control file update.

  The question is: why we must create new controlfile ensures g 11 and 12 c and can we use a simple method of 10g?

  Thank you.

  Hello

  1 why the incremental backup application does not update standby controlfile?

  -Your database pending is be retrieved using the incremental backup. This does not update the eve controlfile. Your standby controlfile completely ignores the last CNS to the primary database.

  2. what happens if we leave the old standby controlfile? RFS will record new logs of the primary, but will ignore them MRP? If so, can update us standby controlfile by manually applying the following log?

  -Your old standby controlfile is unaware of the last CNS to the primary database.

  As Mseberg said, trying things on a test computer and you will have the answers to your questions.

  Kind regards

  Shivananda

• Case of level 1 RMAN incremental backup failure...

  Hello

  I have a question. If the incremental level 1 RMAN backup fails, the next level 1 backup attempt will have backup all changes since the last backup of level 0 OR level 1 successful?

  Best regards

  Hello

  I have a question. If the incremental level 1 RMAN backup fails, the next level 1 backup attempt will have backup all changes since the last backup of level 0 OR level 1 successful?

  Check the dictionary BACKUP_SET V$ to confirm if the last backup has been affected by the data dictionary. If incremental backup failed is picked up then the last incremental backup will be required in the case of the next LEVEL 1 DIFFERENTIAL INCREMENTIELLE backup.

  But to be on the safe side, it is recommended that you take a LEVEL 01 CUMILATIVE INCREMENTAL backup of level 0 up to this day. For the recovery process can go through even if the previous backup is not valid.

  Thank you &

  Best regards

• RMAN incremental backup continue to make backups "complete"?

  Hello, I am new to RMAN. I used only the full backup by RMAN, and it was OK. Now, due to lack of disk space, I decided to make incremental backups.

  I put 'to recovey retention policy window of 3 days; then made a new backup (by MS) job, looks like:

  $rman_script = ' backup database cumulative device type disk tag '% TAG' extra strength 1;

  backup disc tag '% TAG' type device archivelog all not saved delete all entries;

  But, always visible, size of the backup is the same all the time as a full backup? Where is my mistake?

  This is a backup log:

  RMAN > database backup incremental level 1 cumulative device type disk tag "BACKUP_DB10_00002_070413021501".

  From backup 4 July 13

  allocated channel: ORA_DISK_1

  channel ORA_DISK_1: sid = 1043 devtype = DISK

  channel ORA_DISK_1: additional start-up compressed 1 datafile backupset

  channel ORA_DISK_1: specifying datafile (s) in backupset

  input datafile fno = name=/database/app/oracle/oradata/db/tablespace1.dbf 00007

  input datafile fno = name=/database/app/oracle/oradata/db/tablespace2.dbf 00002

  ...

  channel ORA_DISK_1: starting total, 1 to 4 July 13

  channel ORA_DISK_1: finished piece 1 to 4 July 13

  piece handle=/backup/oracle/flash_recovery_area/db/backupset/2013_07_04/o1_mf_nnnd1_BACKUP_DB10_00002_0_8x9d45f5_.bkp tag = BACKUP_DB10_00002_070413021501 comment = NONE

  channel ORA_DISK_1: complete set of backups, time: 00:41:15

  Backup finished on 4 July 13

  > database backup incremental level 1 cumulative device type disk tag "BACKUP_DB10_00002_070413021501".

  There is a Note of support Oracle ' size of level 1 or level 1 cumulative backup greater than level 0 backups [ID 1534691.1].

  which applies if you use the DUNGEON and change the tag.

  I note that you change the tag every day, but do not use the clause to KEEP this note should not apply.

  Why not explicitly run EXTRA STRENGTH 0 backup once and then monitor subsequent LEVEL 1 backups?

  Hemant K Collette

• RMAN incremental backup issue

  Hi all
  
  I'm read on Oracle11g release2 doc RMAN.
  
  In Chapter 9:
  
  "For example, you can implement a three-tier backup plan as well as a level 0 backup is performed every month, a cumulative level 1 is taken from the week, and a premium of level 1 is taken daily. In this strategy, you will never have to apply more than one day to complete recovery redo. »
  
  First I got an error when I try to make a level 0 backup

  RMAN> BACKUP INCREMENTAL LEVEL 0 database;
   
  Starting backup at 27-APR-11
  using channel ORA_DISK_1
  using channel ORA_DISK_2
  using channel ORA_DISK_3
  using channel ORA_DISK_4
  RMAN-00571: ===========================================================
  RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
  RMAN-00571: ===========================================================
  RMAN-03002: failure of backup command at 04/27/2011 20:42:19
  RMAN-20021: database not set
  RMAN-06031: could not translate database keyword

  and if the success of step, how I would go about to implement this?
  I can do this via dbms_scheduler? or I need to do this via cron?
  
  -Thank you very much for the entry

  Your DB must be in use archivelogmode use hot backups. Is your db in archivelog mode?

• NOLOGGING with DEC and RMAN incremental backup

  DB Version: 10.2.0.4
  OS : AIX
  
  We use RMAN for our backup scheduled via cron.
  Retention Policy : REDUNDANCY 1
  Type             : Incremental 

  On the 31 of every month in most of our patterns, we recreate a lot of tables using DEC.
  
  Due to the size, the CREATE TABLE instructions take a while. Because we run on the Standard edition, we cannot use the PARALLELISM.
  NOLOGGING is the only option to improve performance. But we are concerned the roll forward not being generated for these tables and the potential loss of data in case of crash.
  
  Currently we take a Level0 backup every Wednesday and Sunday night and LEVEL1 backup on the rest of the days.
  
  I know that all will be saved on Level0. But what happens if 31 falls on a day which occurs the only backup of level 1. We will be safe only until the next Level0 arrives.
  
  No work around for this?

  HI T.Boyd,

  NOLOGGING is the only option to improve performance.

  So no recovery will be generated but the blocks in the data files will change.

  But what happens if 31 falls on a day which occurs the only backup of level 1.

  Only blocks changed since the last level 0 (or level 1 if you use differential differential) will be saved which includes blocks modified by the ETG.

  No work around for this?

  No need for a work around. You can check at any time whether a certain activity nologging will compromise a restoration with < report="" unrecoverable;=""> .
  Kind regards
  Tycho

• Resume failure RMAN incremental backup to disk 0 cold

  Linux x 86-64 10.2.0.4
  
  I take an incremental backup of 0 to disk in a database that is mounted. I'm backup the database on an NFS volume. I lost the NFS mounting. Is it possible to take a backup where it stopped at? He complains "ORA-27038: created file already exists" if I restart it. RMAN can easily return to a restore. I don't have time to redo everything all again. The database is greater than 10 TB. The target is not upward. Is there something else I could do?

  If you have lost the NFS mounting, has not lost what had been saved to this mount? So, don't you create a fresh backup of all the files again?

  How are you "restart" backup? If you issue a fresh BACKUP DATABASE, it must create a new backup, with new backupsets - I hope the backuppiece (i.e. the name of the file) is unique and/or the file with the same name is not existing on the target.

  Hemant K Collette

• Merger of the RMAN incremental backups

  Hi all
  
  I have a confusion.
  
  Sunday I L0 scheduled backup (backup as compressed).
  Then next 6 days (MON - sat) I incremental backup Level1 (differential).
  
  So let's assume that if I need to restore the Thursday, I need Sunday L0 and L1 of (MON, TUE, WED).
  
  Is it possible to merge L0 and L1 (until WEDNESDAY).
  
  Please specify.
  
  Thanks in advance.
  
  Kind regards
  Bikram

  As long as you use differential incremental backups, you need all of them between the last level 0 backup and recovery at the time point. It is exactly the concept of cumulative incremental backups to change this behavior. In the case of cumulative backups you would only need the full backup and the incremental backup from Wednesday.

  Werner

• RMAN incremental strategy strange level 1

  Hi all
  
  I am currently discovering the environment at the office a new customer and I was surprised by their strategy of RMAN backup. Although I read what Oracle says about this, I'm not sure I well understoud.
  
  So they 9i and 10g database on a Windows 2003 server with the rman scripts (using a catalog) to back this up.
  What shock me is:
  There is no scheduled task, runing every night and calling the same script that resembles a typical rman script, except that it calls the backup database with the parameter "additional = 1. But no level 0 is never ever anywhere.
  
  Here's the script:
  
  run
  {
  SQL 'alter system archive log current';
  }
  
  allocate channel for maintenance of type disk;
  cross-checking of backup;
  delete the backup expired;
  remove the backup noprompt;
  change archivelog than any overlap;
  output channel;
  
  
  run
  {
  SQL 'alter system archive log current';
  }
  
  allocate channel for maintenance of type disk;
  cross-checking of backup;
  delete the backup expired;
  remove the backup noprompt;
  change archivelog than any overlap;
  output channel;
  
  run
  {
  allocate channel ch_disk type disk;
  CONFIGURE the SNAPSHOT CONTROLFILE NAME to ' F:\Oracle\Admin\ABEL9IP\Backup\hot\SNCFRECO10GP. ORA';
  CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK to 'F:\Oracle\Admin\ABEL9IP\Backup\hot\%F ';
  Configure controlfile autobackup on;
  backup incremental level = 1 'F:\Oracle\Admin\ABEL9IP\backup\hot\%d_%T_DB_%s_%p' of database format;
  SQL 'alter system archive log current';
  backup format 'F:\Oracle\Admin\ABEL9IP\backup\hot\%d_%T_AL_%s_%p' archivelog all entry delete;
  output channel ch_disk;
  }
  
  Crash I doubt it can be restored, even if a "restore database validate says it's ok."
  Oracle says, if no level 0 does exist, it backs up went changes since the last backup of level 1.
  
  Any comment on this strategy? Yu think it will work?
  It is difficult for me to test it right now.

  are executed before the backup command, this means whenever the backup works, no level 0 and no backupsets level 1 are available, and so the backup is level 0 type (who wants to say I needed to restore files), right?

  Yes.
  See [http://www.mcs.csueastbay.edu/support/oracle/doc/10.2/backup.102/b14191/rcmconc1005.htm]

  Thank you.

  Published by: virendra.k on July 24, 2009 17:40

• RMAN incremental 0 or 1

  11.2.0.4

  We run incremental 1 and 0 as part of our backup strategy.

  If I want to query the catalog to see what backups were executed, I can choose to RC_RMAN_BACKUP_JOB_DETAILS and discover the input_type.  But this only tells me "INCR".  someone knows a way I can see where its differential 0 or 1.

  You already have an answer. Please query v$ backup_set or v$ backup_set_details.

  If you use the catalogue, then try it with rc_backup_set or rc_backup_set_details.

  Kind regards

  Shivananda

• How to restore the Rman incremental level 0 backup if the SID is different?

  Hi Experts,
  I had a little problem with restore rman backup of level 0. I have backup rman for oracle 11.2.0.1.0 - 64 bit and restore the server to Test 11.2.0.1.0 - 64 bit.
  
  Problem:
  Sid = prd production server
  Sid = prderp test server
  
  Operating system is Oracle linux 5 on both servers.
  
  How to restore Rman if the SID is different?

  Hello

  Refer to this http://shivanandarao.wordpress.com/2012/04/19/duplicating-primary-database-to-a-new-host-without-connecting-to-the-primary-database-in-oracle-10g11g/

  You need to restore it under the same name as you have in the production and later change the dbname using the NEST.

  If you don't want to go with this method, then I suggest you to go with the method of double RMAN.

  http://www.Oracle-base.com/articles/11g/duplicate-database-using-RMAN-11gr2.php
  http://docs.Oracle.com/CD/B28359_01/backup.111/b28270/rcmdupdb.htm

  rman target sys/@prod auxiliary sys/@tst
  RMAN>duplicate target database to 'prderp' nofilenamecheck;
  

  Please close this Re: how to restore the Rman backup if the SID is different? wire by marking as replied.