RMAN size incremental backups have increased.

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• RMAN Duplicate + incremental backups + upgrade to 12 c

  Hello

  IM thinking the best way migrationg and upgrading database 11.2.0.4 to 12 c with reasonable downtime.

  reasonable downtime: 30 Minutes

  Source: Solaris (Intel)

  11.2.0.4

  DB Dimensions: 800G

  Target: Linux

  12 c

  new name of the comic.

  IM thinking to use RMAN Duplicate with option NoOpen(1) (RMAN catalog is in use). Double will be for sure several of 30 minutes then think if I can combine two copies for the recovery of the archivelogs generated during replication to minimize downtime. But is it possible when I change DB_NAME?

  Thank you.

  Hello

  I guess, you may need to check once this document. 412484.1

  I'm really not sure about your source and target system

  If your source is the 'Platform_id' 20, you can enjoy all your needs in 30 minutes or less. If this isn't the case, it is difficult.

  If your platform_id is 20, you can then create physical standby for your 11.2.0.4 and get the same thing, once the database is recovered, you can convert this logic of sleep (note: your database must be validated for the logical expectation), if you convert your logical database in standby mode, then you can change the name of your database to the new name also you can upgarde to 12 c.

  After upgrade, you can still recover all changes to your primary. Once the logic ensures sync with primary then you can pass.

  If your platform_id not 20, then

  You can opt for Golden Gate...

  Thank you

• When the RMAN brand is backup incremental level1 obsolete?

  Hi all
  
  On a server Oracle 10.2.0.2 particular (with ODG), I implemented a strategy of incremental backup. A level 0 backup is available and all level 1 next backups are getting recovered to this first copy of data file. So far so good.
  
  The problem is that all these incremental backups at level 1 stay in my box of flashback and are not cleaned by RMAN. The retention policy is set on a window of 1 day.
  
  When the RMAN will start scoring these backups to level 1 as being obsolete? I guess that these backups are obsolete right after that they were applied to the copy of the data file? This has something to do with the size of the parameter area flashback, which means that it will not begin to remove level 1 backups when RMAN runs into problems of free space on the disk?
  
  Any help is appreciated!
  
  JM

  Hi JM,

  This is expected behavior, because you have changed the default retention of redundancy strategy 1.
  You can find this on My Oracle Support note + incremental backup strategies: Merge [ID 745798.1] +.

  The extract of this says:
  >
  When using Oracle-Suggested policy or a daily incremental backup merged and using a Flash recovery area and then keep the retention policy of RMAN for redundancy 1. This will ensure that the Oracle space management will automatically remove incremental backups at level 1 of the FRA after they have been applied to the image based on the pressure of space in the FRA copy. If you increase the redundancy or set a window of recovery space is is automatically retrieved by Oracle. This works only when the retention policy is set to the default value of redundancy = 1. If the configured retention policy is set to the window of recovery or > 1 redundancy, RMAN cannot satisfy the retention policy if there is only one copy of database and it's at a later point in time. Thus, in order to satisfy political retention Oracle keeps all the incremental backups and archivelogs since the creation of the database because ideally a data file can be re-created and archivelogs can be applied to meet the retention policy (although not followed in the practical case).
  >

  To have made them obsolete automatically, you must add the 'UNTIL TIME 'SYSDATE-2' ' clause to the COPY of RECOVER sentence, for a 1-day recovery window.

  The order having to RETRIEVE it after the BACKUP, you will have the current copy image, and you should only apply the archivelogs if you need to recover instead of use the last day of Level0 backup now level1.

  Kind regards.
  Nelson

• 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

• 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

• While you take the cumulative incremental backup RMAN. Meanwhile users ke

  While you take the cumulative incremental backup RMAN.
  During this time users keep be updated, insert the corresponding schema.
  But my Client doesn't backup up-to-date. Is it possible to get the up-to-date backup?
  (If I have something wrong, sorry about that, that was my interview question)
  
  Thanks for all,
  Kind regards
  DB

  DB wrote:
  While you take the cumulative incremental backup RMAN.
  During this time users keep be updated, insert the corresponding schema.
  But my Client doesn't backup up-to-date. Is it possible to get the up-to-date backup?
  (If I have something wrong, sorry about that, that was my interview question)

  Thanks for all,
  Kind regards
  DB

  RMAN backup is not compatible and easy to follow on-line transactions. If it's something any purpose of migration suggest taking COLD backup.
  If it's no way suggested, then after your entire + cumulative backups, however, that data will be available in archives

• RMAN backup with the smallest size of backup

  Oralce 11g 2 on Redhat 5. Disk space is our the tighter resource, and we want an incremental backup with Level0 Sunday and level 1 every day of the week and on Saturdays. I'm using the comamnds to do the job

  --Sunday
  backup incremental level 0 tag 'level_0' database plus archivelog;
  --Other days
  backup incremental level 1 database plus archivelog delete all input;

  I don't think that it is the best practice or produce smaller backup files.
  
  What are you comments and opinions. Thank you

  RMAN backup except for the backup copy will only backup blocks used, which is quite efficient. Backup incremental level 1 are set by default and the smallest of the incremental backup.

  However, you can enable compression reduce the size of the backupset (Oracle 10 g and more). You can also enable the block track the changes in the database only once, so that backup incremental level 1 do not need to analyze the data files for the changes - this allows saving a lot of time and IO.

  SQL > ALTER DATABASE ENABLE BLOCK CHANGE TRACKING;

  RMAN > run {sql 'alter system switch logfile' ;}}
  RMAN > BACKUP AS BACKUPSET INCREMENTAL LEVEL 0 COMPRESSED DATABASE MORE ARCHIVELOG DELETE ALL ENTRIES;
  RMAN > ACE COMPRESSED BACKUPSET INCREMENTAL LEVEL 1 DATA BACKUP MORE ARCHIVELOG;

  I would prefer not to delete the archivelogs after each incremental backup of level 1 in order to make a point in time recovery without the need to restore the archivelogs.

  And don't forget to:
  CONFIGURE CONTROLFILE AUTOBACKUP ON;

  I hope this helps.

• 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

• How to find sizes backupset for full and incremental backups

  How can I get the exact sizes of backupsets, full and incremental backups RMAN? In addition, it would be nice to separate the backupset size in data and archiving logs files.

  Don't know exactly what you can include in your output, but the following is an example:

  SQL> select ctime "Date"
    2       , decode(backup_type, 'L', 'Archive Log', 'D', 'Full', 'Incremental') backup_type
    3       , bsize "Size MB"
    4  from (select trunc(bp.completion_time) ctime
    5          , backup_type
    6          , round(sum(bp.bytes/1024/1024),2) bsize
    7     from v$backup_set bs, v$backup_piece bp
    8     where bs.set_stamp = bp.set_stamp
    9     and bs.set_count  = bp.set_count
   10     and bp.status = 'A'
   11     group by trunc(bp.completion_time), backup_type)
   12  order by 1, 2;
  
  Date      BACKUP_TYPE    Size MB
  --------- ----------- ----------
  03-JUL-10 Archive Log       7.31
  03-JUL-10 Full             29.81
  03-JUL-10 Incremental    2853.85
  04-JUL-10 Archive Log       3.59
  04-JUL-10 Full              7.45
  04-JUL-10 Incremental       3.05
  
  6 rows selected.
  

• Unlike cumulative and incremental backups in RMAN premium

  Could someone please explain with example on Cumulative and differential incremental backups in RMAN... ?
  
  It is true that in Oracle 10 g, we have only level 0 and level 1 incremental backups?
  
  -Yasser

  incremental backup diffrentail backup of the blocks that have changed since the last level or same level backup IE

  SAT             L0     (include blocks which ever been used block 1,2,3)
  after that             block changed only 3
  SUN             L1     (block 3)
  after that             block changed occur 2
  MON             L1     (include block only 2)
  Mon (night)     L2     (include those block which modified after Monday L1 backup)
  
  Cumulative will take backup with its level (n-1)
  
  SAT             L0     (include blocks which ever been used block 1,2,3)
  after that             block changed only 3
  SUN             L1     (here n is 1 then n-1=0 include block 1,2,3)
  MON             L1     (here n is 1 then n-1=0 include block  1,2,3)
  Mon (night)     L2     (here n is 2 then n-1=1 include those block which modified after Monday L1 backup)
  

  Khurram

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