The next step then is to execute the repair command to automatically fix the issue for me. If no DB_UNIQUE_NAME initialization parameter is set for a target database, then use either RESTORE DB_NAME or RESTORE DB_UNIQUE_NAME. For password-mode encrypted backups, the required passwords must be provided with SET DECRYPTION. RMAN then creates the required backup sets on the source database, transfers them to the destination database, and then restores them on the destination. Note: This option only works if your media manager supports this functionality. Prerequisites for Restoring Files Using a Remote Host. No files are restored. In this environment I have a small database called testdb with only a few datafiles and archive logs so the backup does not take too long. If the DB_UNIQUE_NAME initialization parameter setting for a target database is different from DB_NAME, then use RESTORE DB_UNIQUE_NAME.
Subsequently, these backup sets are backed up to Oracle Cloud using the BACKUP BACKUPSET ALL command. Note: If you use RESTORE with the VALIDATE option, then the database can be open with data files online. For files on both disk and tape, RMAN reads all blocks in the backup piece or image copy. These parameters override the parameters with the same name at the RESTORE command level. By default, RMAN restores data files in read-only tablespaces. Use TO 'filename' instead. archive log filename=/u03/oradata/xwiki/archiving/1_8_691685756.arc thread=1 sequence=8 using channel ORA_DISK_2 The password file on the source database and the target database must be the same. If you are restoring a data file for which no backups are available, then RMAN creates an empty data file with the checkpoint change as creation SCN. Here is a brief overview on how to proceed. You can use as many pairs of source and destination replacement strings as required. -rw-r 1 oracle oinstall 52429312 Jul 12 22:01 redo01.log If RMAN attempts to restore a offsite backup, then the restore operation fails. Dbvisit Software Inc.849 Almar Avenue, Suite C190Santa Cruz, CA 95060USA, Dbvisit SoftwareLisabonsk 799/8190 00 Praha 9Czech Republic, Dbvisit Software LimitedLevel 1, 506 Pt Chevalier RoadP.O. List of Datafiles in backup set 82 The restored data files are non-sparse. The metadata required to plug this tablespace into the target database is stored in the backup set /tmp/xplat_restores/example_dmp.bck. This example restores the data file users.dbf that was lost on the primary database by restoring it, over the network, from the standby database: The service name of the remote database that contains the data file to be restored is standby_tns. Only if autobackup is not in default location, Only if autobackup is in noncurrent recovery area, Only if autobackup is in noncurrent recovery area and uses a noncurrent DB_UNIQUE_NAME, Restoring Control Files From Archived Backups in NOCATALOG Mode. I will leave a few of the more advanced options for another post. To simulate this, I shutdown the database, delete one datafile from the ASM storage.
Only use with recovery catalog for testing. But keeping longer than that is not a bad idea. Finished restore at 13-JUL-09, At this point we are not yet ready to put the datafile back online. This subclause specifies parameters that control the search for a control file autobackup. When FOR DB_UNIQUE_NAME is specified, RMAN can locate the correct RMAN configurations for the host on which the SPFILE is being restored and use them to access backup devices. The only differences are in connecting to the database and in the commands used. PREVIEW RECALL requests that any media needed to restore archived redo log files from backup be recalled from offsite storage. To restore a whole CDB, the root, or multiple PDBs, you connect to the root. If you restore encrypted databases or tablespaces, then the Oracle keystore must be open before performing the restore operation. The example restores the control file from tape, mounts the database, and then restores and recovers the database. Restores all data files in the database except those that are offline. If MAXCORRUPT is exceeded, then the command terminates without populating the views. You can override the default location with the SET ARCHIVELOG DESTINATION command. Restores data files from the appropriate non-sparse backup. Starting with Oracle Database 12c, you can restore a database, data files, control files, tablespaces, or an spfile using files from a remote database. I will also introduce you to the Data Recovery Advisor, which is a new feature that was introduced in Oracle 11g. This subclause specifies options for the restoreObject clause. Example 3-38 Restoring a Tablespace Using a Cross-Platform Consistent Backup that Contains Multiple Backup Pieces. The output is in the same format as the output of the LIST BACKUPS SUMMARY command. Restores all data files in the specified tablespaces (see Example 3-24). In my case I know the file is deleted, but you can easily confirm this if you look at the ASM storage using the asmcmd command. List the backup pieces in the same order in which they were created. Limits the selection to backup sets or file copies that are suitable for a point-in-time recovery to the specified time, SCN, or log sequence number. This can easily be done by executing the following. Use the BACKUPSET syntax to specify the backup set to be restored. RMAN also enables you to perform restore for both multitenant and non-CDB sparse databases with the COMPATIBLE initialization parameter set to 12.2 or higher. Specifies the DB_UNIQUE_NAME of the database in the specified fast recovery area that is the target of the restore operation. RMAN scans both disk and Oracle Cloud backups and then retrieves the latest control file autobackup. The tag restricts the automatic selection to backup sets or file copies created with the specified tag. You can compress the transferred files by specifying the USING COMPRESSED BACKUPSET. Because the two databases have the same DB_NAME, the records in the recovery catalog can only be distinguished with the DB_UNIQUE_NAME initialization parameter. PREVIEW can identify backups needed for a RESTORE operation that are stored on media that requires retrieval. Note: This clause can be used only to restore data that was backed up using backup sets. RMAN restores the files to the path names specified by SET NEWNAME.
The same keystore used when creating the backup must be open and available when restoring it. PREVIEW command, which identifies the backup sets RMAN selects for use in restoring archived redo log files. Now that the datafile is brought up to speed, we can put our datafile online again. It cannot be used for backups created as image copies. To restore a sparse backup, run the RESTORE FROM SPARSE command. -rw-r 1 oracle oinstall 20979712 Jul 11 06:00 temp01.dbf using channel ORA_DISK_3 Unlike BACKUP DATABASE, RESTORE DATABASE does not automatically include the control file and the server parameter fileyou must issue additional RESTORE CONTROLFILE and RESTORE SPFILE commands to restore these files. For example, if you made backups of a data file with DISK and sbt channels, and if only a DISK channel is allocated for the RESTORE command, then RMAN does not restore the sbt backups. The RESTORE command automatically looks for another usable copy of a backup or image copy on the same device and other devices. (64bit). In a Data Guard environment, the primary and standby hosts may have different channel configurations for communicating with their associated SBT backup and disk devices. Restores either a standby or backup control file depending on the target database role. To perform cross-platform tablespace transport by connecting over the network to a remote database, use the FROM PLATFORM clause with the FROM SERVICE clause. Remember that when you schedule backups in scripts it is always important to keep multiple log files and not overwrite the log file every day. The extract below shows you that all my datafiles are now looking good following the restore and recovery: Once done you can use the list failure closed command to show you a listing of closed (resolved) failures. I know writing complex scripts is fun, but it is not always necessary. PREVIEW with the RECALL option. The tnsnames.ora file in the target database must contain an entry that corresponds to the remote database. Connect to RMAN after setting up Operating System Variables, Imp : In the case of SYSTEM and SYSAUX datafile is corruption , online recovery is not permitted . RMAN uses the database key to encrypt the data. To restore files to a nondefault location, use SET NEWNAME commands to rename the restored files and then use a SWITCH command to make the restored files current (as illustrated in Example 3-25). You can offload backups stored on disk either to tape or Oracle Cloud. So start simple, make sure your backup and recovery processes work and are well documented, and only then look at more complex configuration options. archive log thread 1 sequence 9 is already on disk as file /u03/oradata/xwiki/archiving/1_9_691685756.arc This parameter is only useful in a Data Guard environment. Box 44223Auckland 1022New Zealand, Restoring with RMAN and using the Data Recovery Advisor. channel ORA_DISK_1: restore complete, elapsed time: 00:00:16 82 Full 137.80M DISK 00:00:55 06-JUL-09 But what I would like to do now is show you how you can use the Data Recovery Advisor to help you through this process. Use password-based encryption only when absolutely necessary because your backups must be transportable. I created a blog post focusing on Three steps to getting started with RMAN and if you have not read it yet I do recommend you take a quick look, as getting the basics right when using RMAN is crucial to making the most out of this utility. PREVIEW output is in the same format as the LIST BACKUP output (see Example 3-31). See Also: LIST, specifically the BACKUPS and SUMMARY options, and the RECOVER VALIDATE HEADER command. On the first day searched, the search begins with sequence number 256 (or the sequence number specified by MAXSEQ, if provided) and counts back to sequence 0. We know now that datafile 5 is the one to restore.
Specifies how Oracle Database file names on the source CDB map to the corresponding files on the destination CDB during cross-platform transport of a PDB to a destination CDB. Rapid database refresh using RMAN Duplicate and Dbvisit Snapshots. When for some reason a datafile is lost and RMAN is in place. RMAN begins the search on the current day or on the day specified with the SET UNTIL. RMAN replaces the current data file names in the control file with the names of the restored files. oracle@xxx: $ ls -ltr If you are using a normal filesystem based storage you can just navigate to the directory and look at a listing of the files. When restoring backups that are stored in archive storage in Oracle Cloud Infrastructure Classic, use this option to first recall backups before you restore them. RMAN connects to the remote database and transfers the required files, over the network, to the target database using backup sets. Any file names explicitly renamed with ALTER DATABASE RENAME FILE take precedence over the file names in the recovery catalog. The COMPATIBLE parameter for the on-premise database is set to 12.2 and the backups are created with COMPATIBLE set to 12.2. The export dump file containing the metadata of the tablespace is stored in /tmp/xplat_restores/example_mutli-piece_dmp.bck. RMAN-00571: =========================================================== Assume that you perform a switchover from primary database dgny to standby database dgsf, so that dgsf is the new primary database.
Assume that you perform a switchover from primary database dgny to standby database dgsf, so that dgsf is the new primary database. RMAN clears the checksum if DB_BLOCK_CHECKSUM is set to false. If no sparse backup is available for this operation, the restore will fail. PREVIEW periodically to monitor whether the needed backups are stored locally again. If any of the conditions is not met, then RMAN restores the files. If the test database uses a fast recovery area that is physically the same as the recovery area used by the production database, then set DB_UNIQUE_NAME in the test database instance to a different name from the production database. I have not gone into detail relating to the Data Recovery Advisor, but wanted to highlight this feature for you. By default, RMAN transfers files as backup sets. By default, RMAN examines read-only data files to make sure they exist, are readable, and have the correct checkpoint. Example 3-33 Validating the Restore of a Backup. Note: To restore offline data files you must use RESTORE DATAFILE or RESTORE TABLESPACE. If the total number of physical and logical corruptions detected in a file is less than its SET MAXCORRUPT setting, then the RMAN command completes and the database populates the V$DATABASE_BLOCK_CORRUPTION view with corrupt block ranges. The following commands restore the encrypted backups from Oracle Cloud to an on-premise database and without using encryption: Oracle Database Backup and Recovery User's Guide, Oracle Data Guard Concepts and Administration, Restoring a PDB into a New CDB Using Cross-platform Backups of the PDB, Description of the illustration restore.eps, Description of the illustration restoreobject.eps, Description of the illustration restorespecoperand.eps, Description of the illustration autobackupoptlist.eps, Specifies the copy number of the backup piece within a set of duplexed backup pieces. This syntax is required only when connected to the root. Enterprise-class Disaster Recovery for Oracle SE and Microsoft SQL Server that prioritizes database integrity, disaster resiliency, recovery speed, and ease of use. In this case, you can specify STANDBY CONTROLFILE to override the default RMAN behavior and restore a standby control file. channel ORA_DISK_1: reading from backup piece /u04/backup/XWIKI/rman/backup_df_142_692056911.bak DBA by Profession, coach by passion. channel ORA_DISK_1: sid=141 devtype=DISK I know I have a recent backup and that all archive logs are still on disk, so I should be able to do a full recovery. See Also: Table 3-9 for restrictions and usage notes. Below is the output when these commands are executed: Now if I look at the status of the datafile I can see that everything is back to normal again and the file was successfully restored and recovered. Summarizes the backups that RMAN would restore. A datafile will become inaccessible to an oracle database, if the file is corrupted or missing . So, I now have a standby database, what can I do with my.
The on-premise database does not use encryption and the database backups are also not encrypted. Loves to travel, Reading. This clause specifies the data that must be restored (data files, tablespaces, or entire database) and the backup sets that contain the data to be restored. Restores backups of an encrypted database or tablespace such that the restored data blocks are not encrypted. Note: This clause is supported only when restoring whole databases or tablespaces. Cross-platform data transportation is supported starting with Oracle Database 12c Release 1 (12.1). To restore a CDB, use RESTORE DATABASE and to restore the root, use RESTORE DATABASE ROOT. Use the RESTORE command to restore, validate, or preview RMAN backups. For example, if channel ch1 connected to inst1 can read log 1000 from its tape drive, but channel ch2 connected to inst2 cannot read the same log from its tape drive, then ch2 cannot participate in restoring the log and so ch1 restores the log. You can restore data files on a primary database by connecting to a standby database over the network. This is useful when you want use existing RMAN backups to move an on-premise database to Oracle Cloud. - - - Tag names are not case sensitive. However, the database on Oracle Cloud must use encryption. You start the RMAN client, connect to the target and recovery catalog databases, and run the following commands: RMAN restores the control file to its default location and replicates it automatically to all CONTROL_FILES locations. In an Oracle RAC configuration, RMAN automatically restores backups, control file copies, and data file copies from channels that can read the files on tape or a local file system. You can also restore data files on a standby database by connecting to the primary database. service_name specifies the service name of the remote database. How to restore one datafile following corruption or lost file. Specifies a restore point, with the SCN at which the restore point was created as the upper, inclusive limit. Catalog, target database started in NOMOUNT state.
If a backup piece, image copy or proxy copy is inaccessible or if a block is corrupted, then RMAN performs restore failover. Specifying the FOREVER keyword does not change the behavior of SKIP. Optionally, use SECTION SIZE to restore files from the source database as multisection backup sets. To restore all data files belonging to an application PDB, connect to the application root as an application common user with the SYSDBA or SYSBACK privilege. Now that the datafile is offline , we are ready for the RMAN datafile restore. This option is only valid on the RESTORE CONTROLFILE and RESTORE SPFILE commands. This includes the application root and all application PDBs that belong to this application root. If a link file is lost and you restore a data file without re-creating the symbolic link, then RMAN restores the data file to the location of the link file rather than to the location pointed to by the link file.