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What options are available to restore an Oracle table to a point in time?
Options available include specifying a different location for the dumpfile, remapping the table to a new tablespace (using the REMAP_TABLESPACE clause to impdp), importing the table to a new name in the existing tablespace (using REMAP_TABLE) and you can have RMAN export the table but not import it with the …
What are the ways to improve RMAN backup/recovery performance in terms of time?
Tuning RMAN Backup Performance
- Step 1: Remove the RATE Parameter from Channel Settings.
- Step 2: If You Use Synchronous Disk I/O, Set DBWR_IO_SLAVES.
- Step 3: If You Fail to Allocate Shared Memory, Set LARGE_POOL_SIZE.
- Step 4: Tune the Read, Write, and Copy Phases.
What are pre checks you do before doing point in time recovery?
Pre-requisites for the DBPITR: You must have all the datafile backups available prior to target time to recover. You must have all archivelog files available between previous backups & target time, in case of these files have been moved ( on usb disk or tape ) from default location then move it back to the same.
What is RMAN Fileperset?
Answer: The filesperset argument specifies the number of files to be allowed in a backup set. What this means is that it is possible for RMAN to read two datafiles at the same time and then write them to an output device in the form of a backup piece.
How is RMAN used to back up and restore files?
You can create backup strategies using Oracle Recovery Manager (RMAN) with Oracle Data Guard and standby databases. RMAN can perform backups with minimal effect on the primary database and quickly recover from the loss of individual data files, or the entire database.
How to recover RMAN to point in time?
Close the database, delete all datafiles, thereby simulating media crash, start the database in mount mode and recover the database until the fourth archived redo log and open the database with the resetlogs option: #We have 5 archived redo logs generated.
How does RMAN work in Oracle Data Guard?
The catalog also records where the online redo logs, standby redo logs, tempfiles, archived redo logs, backup sets, and image copies are created. RMAN commands use the recovery catalog metadata to behave transparently across different physical databases in the Oracle Data Guard environment.
Can a database backup be restored to another database?
An RMAN recovery catalog is required so that backups taken on one database server can be restored to another database server. It is not sufficient to use only the control file as the RMAN repository because the primary database has no knowledge of backups taken on the standby database.