Therefore, the incremental backup may fail with SQL2426N rc=2 on new HADR Primary database because of no full backup information on the SYSTOOLSPACE table space. Enable force logging, and make sure at least one log file is present: SQL> ALTER DATABASE FORCE LOGGING; SQL> ALTER SYSTEM SWITCH LOGFILE; Create standby redo logs, setting the same size and quantity as the primary database redo logs: log' size 50M Adding the redo log groups: Sql>alter database add logfile group 4 A redo log file might become corrupted 1. Replace the controlfile from backup 10. refer Oracle Support doc SQL-PRODDB> select a.dest_id,a.thread#, applied "Last Applied Seq", b.notappld "Current Seq", b.notappld-applied "Difference" from.

Create Standby Control file 6. STEP2ON THE STANDBY DATABASE, FIND THE SCN WHICH WILL BE USED FOR THE INCREMENTAL BACKUP AT THE Now lets see the process to perform the incremental backup as follows. You should use the procedure described in a previous blog post about backups on a standby database.

In RMAN, connect to the PRIMARY database and create an incremental backup from the SCN derived in the previous step: RMAN> BACKUP INCREMENTAL FROM SCN 3162298 DATABASE FORMAT '/tmp/ForStandby_%U' tag 'FORSTANDBY'; 4. Incremental backup will recover the standby database much faster than applying the archives as it will apply only the COMMITED transactions on the standby database . When you reach the final incremental backups you need to follow the information below. This method is used to resolve problems if a physical standby database has lost or corrupted archived redo data or has an unresolvable archive gap. Now it all makes sense. SQL> select instance_name from v$instance; INSTANCE_NAME sdb SQL> archive log list Database log mode Archive Mode You need to use the lowest SCN from the the 3 queries below : SQL> alter database mount standby database; Database altered. STEP1STOP THE MRP PROCESS. We can use the RECOVER DATABASE USING SERVICE to sync the standby database with the primary. Enable MRP 15. Take a SCN backup, and copy backup onto standby server. RMAN> BACKUP INCREMENTAL FROM SCN 7883734410408 DATABASE FORMAT '/tmp/testdb_styby_%U' tag 'INCFORSTANDBY'; Prepare Standby ControlFile and New Datafiles. In this article we outline the process of rebuild the Physical Standby Take a cumulative incremental backup on the primary. 3) Incremental SCN for standby/ Roll Forward. The goal of this document it to accomplish this in an Active DataGuard database. You need to use the lowest SCN from the the 3 queries, which here is -> SCN: 3162298. In 12c, this procedure has been dramatically simplified. Tue Sep 22 20:36:09 2015 Archived Log entry 41 added for thread 1 sequence 75 rlc 891019946 ID 0x120cba27 dest 2: group# as lgroup,thread#,lf Alter database recover managed standby database through all switchover disconnect using current logfile SELECT owner, object_type, COUNT (*) FROM dba_objects WHERE status='INVALID' GROUP BY owner, it is happend that standby database was down for a week on standby side use query result to find out minilal scn of files wich one not in read only mode. Till 11g , we can make standby db sync with primary by taking an incremental backup from primary and apply the same in standby . Backup the datafiles. Hello, friends in this tutorial Im going to demonstrate to you how to Resolve huge archive gap between primary and standby.

Recover standby 14. FROM SERVICE command to synchronize the physical standby database with the primary database. This are the archives which are required to make the datafile backup consistent. Reconnect to your physical standby database and shut it down: SQL> shutdown immediate; If you use flashback option (else continnue with step 13): SQL> startup mount; SQL> alter database flashback on; SQL> alter database open; Restart physical standby: SQL> startup; Finished! During media recovery, RMAN examines the restored files to determine whether it can recover them from an incremental backup. How to Truncate, Delete, or Purge Rows from the Audit Trail Table AUD$ (Doc ID 73408 At standby site, Do the log file registration at the standby site until all the missing log files are registered, Use this below command sql statement: alter database mount standby database RMAN-05529: WARNING: DB_FILE_NAME_CONVERT resulted in invalid ASM names; names At this point the standby database will have been updated with changes from the primary, including those which would have been contained in the missing archive log file (s). The workaround is to set a hidden parameter on the standby database (alter system set _time_based_rcv_ckpt_target=0;) and restart the redo apply. Thus, you can apply an incremental backup of a standby database to a primary database, or apply an incremental backup of a primary database to a standby database. SQL Stby> alter database recover managed standby database cancel; Database altered. Test database is open usually about a month so using incremental backups for refreshing is pretty much the only thing reasonable. Step 1) We will take standby controlfile from primary and restore in standby database --> After restore, your standby also will give you 8 datafiles list not more than that Step 2) We will do all datafiles incremental backup and restore-----> It works without any issue, because you have controlfile, it has only 8 datafiles details

Suppose in between primary & standby have many archives difference like 500 archives, so we have need to recover it using incremental backup, follow me. 6. STEP1STOP THE MRP PROCESS. NOW change the standby database incarnation which is there in primary. You need to synchronize a standby DB from an incremental RMAN backup in these two cases: 1-There is a big gap between the primary database and the standby database whereas copying and applying the archives from Production to DR site will take a long time.2-You lost one or more archive log file on the primary site that needed for the recovery of the standby database or On Primary Database: connect as sys user and check the archive log list SQL> conn sys/oracle@sdb as sysdba Connected. On a physical standby database, the received archived redo logs can be displayed like this: SQL>Alter database backup controlfile to trace SQL>Alter database open ; For database version 10g and above First check the current log groups and add current + 1 standby log groups alter database recover managed standby database disconnect from session ; Once it has moved to 2. Action ON . Find current SCN from Standby 4. 2-Some archivelogs on the primary which have not been applied to the standby have been lost. 3. In standby: RMAN> reset database to incarnation 2; database reset to incarnation 2. rman> switch database to copy; Now shutdown and mount the database again. In this case either we need to use workaround 2 or 3. When this happens you must rebuild the Standby database using primary database backup. But with 12c , a new feature has been introduced ( RECOVER DATBASE USING SERVICE) , which simplifies this method a lot . Step-9: Catalog the new Incremental backups on Standby Server as follows.

Now you can use the RECOVER . 1. All changed blocks captured in the incremental backup are updated at the standby database, bringing it up to date with the primary database. With an RMAN client connected to the standby database, run the following command:

Mount Standby Database 11. Now recover the standby database using the noredo option to apply only incremental backups: RMAN> recover database noredo; RMAN will apply only incremental backups to the standby database. Similarly, you can perform RMAN incremental backups your physical standby, but you cannot perform fast RMAN incremental backups using RMAN block change tracking. Actually I use this method with backups taken from physical standby database, so in that case its not necessary to take the archivelogs also, just shut down media recovery process before starting the backup. [oracle@dbv1 standby]$ ./dbvctl -d DEV --sync ----- Use RMAN incremental backups to synchronise a physical standby database with the primary database. Employing incremental backups of the primary database containing changes since the In 12c, the method remains the same, but it has been made easier.

Now it is time for the final incremental backup. You can use LOG_FILE_NAME_CONVERT and DB_FILE_NAME_CONVERT parameter explicitly with DUPLICATE command Now create new online redo logs When SQL Server allocates a page to a table or index for which no file group was specified when they were created, the pages are allocated from Go to Primary database and see a) Create a standby control file from primary, and then copy onto standby database server. The following image shows the incremental backup process: All the changes between the SCN of the original image copy and the SCN of the incremental backup are applied to the image. At the standby database, you can use RECOVER with NOREDO to apply the incremental backup. Switch a logfile. Apply incremental backup to the standby database RMAN> recover database noredo; 7. 4. Lets see how ClusterControl can automate the verification of PostgreSQL and TimescaleDB backups and help avoid any surprises. Start the managed recovery of the standby database. Solution_for_Ora_16724_Standby_database (author: Arup Nanda) The standby database might be recovered using incremental backups taken from the primary database. For this, perform the following steps: From the primary side, use the backup incremental from scn command and provide the scn value taken from the standby database to take a backup of the changes made after the specified scn value: Read more. Apply the Incremental Backup to the Standby Database Use the RMAN RECOVER command with the NOREDO option to apply the incremental backup to the standby database.

Recover the standby database with the incremental backup. Take Incremental backup of primary database from last applied SCN on standby database. 18c Shutdown Standby 9. Example. 3. First, we need to create the new table name as sample_incre from another two tables as follows. Closing the gap using incremental backup is fairly easy: Find the current SCN; Backup the primary database from the point (it might take some time, depending on the size of the database) Recover the incremental backup in the standby database: Finding the current SCN. Take a SCN backup, and copy backup onto standby server. [Standby] Stop the managed standby apply process: STANDBY_SQL > alter database recover managed standby database cancel; Database altered. SQL> alter database create standby controlfile as '/backup/standby_incr.ctl'; 8. REFRESH STANDBY USING INCREMENTAL(SCN BASED) BACKUP. From the primary side, use the backup incremental from scn command and provide the scn value taken from the standby database to take a backup of the changes made after the specified scn value: Switch to the standby database and register the incremental backup using the catalog command: Action: Specify a smaller incremental-start SCN. There was nothing to backup so failed. You then apply the incremental backup to the standby database, which updates it with all changes. The steps in this post can used to resolve problems if a physical standby database has lost or corrupted archived redo data or has an unresolvable archive gap. Switch to the standby database and register the incremental backup using the catalog command: Now recover the standby database using the noredo option to apply only incremental backups: RMAN will apply only incremental backups to the standby database. Then switch the redo log file on the primary database and apply it on the standby side: RMAN> RECOVER DATABASE NOREDO; Step 7 On the Primary database create a standby control file backup. 9. Resolve the archival gap between primary and standby database with help of RMAN. Cancel MRP 13. Create new standby controlfile at the production database, copy this to standby system and replace current standby controlfile with this new one. 1. Make sure you stop the managed recovery process (MRP) before going ahead with further steps. 2. On the STANDBY DATABASE, find the SCN which will be used for the incremental backup at the primary database. See Also: Oracle Data Guard Concepts and Administration to learn how to back up a standby database with RMAN. Solution Out line: Take the scn of last log missing from Standby,take rman incremental backup using SCN clause from production, and apply on standby. The automatic verify backup feature is available for the scheduled backups. Since an incremental backup can only be applied to a datafile whose checkpoint SCN is between the backup set incremental-start SCN (inclusive) and the backup set checkpoint SCN (exclusive), there is no datafile that this backup set could ever be applied to. The recovery of the standby is relatively simple. RMAN> catalog start with '/oracle/backup/'; List of Cataloged Files ===== File Name: /oracle/backup/incremental.rman How do I resolve an archive gap? All changed blocks captured in the incremental backup are updated at the standby database, bringing it up to date with the primary database. Find the last SCN on primary and standby database. The fact that the primary and standby are completely identical (at the files binary level), means you can backup the standby database and if needed, restore the datafiles to the primary. STEP2ON THE STANDBY DATABASE, FIND THE SCN WHICH WILL BE USED FOR THE INCREMENTAL BACKUP AT THE RMAN> BACKUP INCREMENTAL FROM SCN 7883734410408 DATABASE FORMAT '/tmp/testdb_styby_%U' tag 'INCFORSTANDBY'; Prepare Standby ControlFile and New Datafiles. Catalog backuppiece 12. 1 2: REFRESH STANDBY USING INCREMENTAL(SCN BASED) BACKUP.

[Standby] Shutdown the standby database STANDBY_SQL > shutdown immediate; Database closed. 2) If archive is corrupted at OS level, if we do have backup, Then Restore archive logs from Backup. Thus your physical standby database could be open read-only, but it cannot be applying redo at the same time. RMAN> restore standby controlfile from '/oracle/backup/standby0405.ctl'; Step-8: mount the standby database. I assume you have conducted a level 0 and a number of incremental backups on the standby database. RMAN> restore standby controlfile from '/oracle/backup/standb01.ctl'; Step-8: mount the standby database. SQL Stby> alter database recover managed standby database using current logfile disconnect; Database altered. Overview: At times standby database can go out of Sync for many reasons like, accidentally deleting archive log on primary or RMAN backup deleted archive log before shipping to standby database server. 5. Cancel managed recovery of the standby database and apply incremental backup to the standby database. Recover the standby database with incremental backup pieces. Create an incremental backup: Take an incremental backup starting from the standby SCN -The one we checked in Step1-: RMAN> Backup incremental from SCN 1552405397 database tag=FOR_STANDBY format /backupdisk/%d_%t_%s_%p; Move the backup pieces to the DR site: #scp /backupdisk/* oracle@dr:/ora_dr1/backup_inc Step 3: On The DR Site: select * from pg_class; When we execute the above statement it shows the records from pg_class table and it contains the 427 records. Otherwise rebuild the complete DR from Scratch. Database dismounted. SQL> alter database add standby logfile group 12 '+DG_TST_FRA' size 2048M; Database altered Drop the Online Redo Logfile Group: SQL>ALTER DATABASE DROP LOGFILE GROUP 2; If you have skipped Step 4 then you will get ORA-01624 while droping the Online Redolog Group with Status CLEARING alter database add logfile thread 1 group 5 Start managed recovery of standby database. Take RMAN Incremental from SCN (Primary) 5. RMAN Incremental backup, recover database noredo does nothing. rman> crosscheck backup; The logic is to stop redo log apply first and then start redo log apply in real time mode.

All changed blocks captured in the incremental backup are applied at the standby database, bringing it current with the primary database. Step-9: Catalog the new Incremental backups on Standby Server as follows. On the standby database, clear all standby redo log groups (there may be more than 3): SQL> ALTER DATABASE CLEAR LOGFILE GROUP 1; SQL> ALTER DATABASE CLEAR LOGFILE GROUP 2; SQL> ALTER DATABASE CLEAR LOGFILE GROUP 3; 14 Well did not help Add standby redo log file alter database add standby logfile group 11 ('+DATA1','+DATA1') size 1G; 3 To drop a logfile, backup as compressed backupset incremental level 1 cumulative database filesperset 15; Or get the scn to recover from on the standby using the lower value from following SQLs Search: Alter Database Clear Logfile Group Standby. Resyncing the standby data using RMAN incremental backup taken from the primary database. Stop log apply and transport services. Transfer Backup to standby 7. This capability faciliates the temporary conversion of a physcial standby database into a reporting database, as described in Oracle Data Guard Concepts and Administration.. In ClusterControl, select your cluster and go to the Backup section, then, select Create Backup. The full backup information like "Full Backup LSN" and "Last Backup LSN" can be checked by db2ckbkp command against the backed up image file based on the current database as below. The goal of an incremental backup is to back up only those data blocks that have changed since a previous backup. --Take incremental backup since no log sync happened at Primary Site. This backup contains all changed blocks since the standby database was created or last synchronized. RMAN> catalog start with '/oracle/backup/'; List of Cataloged Files a) Create a standby control file from primary, and then copy onto standby database server. This method is used to resolve problems if a physical standby database has lost or corrupted archived redo data or has an unresolvable archive gap. Typically, when rolling forward a physical standby database using primary incremental backup, multiple steps are required: Identify the Start SCN on Standby for performing incremental backup on primary; Perform incremental backup on primary with FROM SCN clause; Move the backup-pieces from primary to standby; Catalog the backup-piece on Standby On the STANDBY DATABASE, find the SCN which will be used for the incremental backup at the primary database. Let us assume that the archive log deleted by the user accidentally from primary database, which is not shipped to standby database. ex, Either take a level 1 backup. Apply incremental backup to the standby database on the DR server, using RMAN: RMAN> RECOVER DATABASE NOREDO; 9. SQL> alter database mount standby database; Database altered.

List Control file location on standby 8. 4. Create incremental backup from primary and recover standby.
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