Oracle RMAN backup Optimization

Oracle RMAN backup is one of the oracle backup methods. The following describes the optimization of oracle RMAN backup and the backup of RMAN databases for your reference.

To back up data, follow these steps:
1. read data from the disk
2. process data blocks in memory
3. Write Data to disk or tape

The preceding read/write operations can be completed synchronously or asynchronously. In synchronous I/O operations, only one IO operation is allowed at a time, but in asynchronous I/O operations, multiple I/O operations are allowed at a time. Therefore, backup and recovery optimization is mainly focused on the following aspects:

1. Improve the synchronous or asynchronous I/O operation capability. On the Operating System Supporting asynchronous operations, you can set TAPE_AYSNCH_IO, DISK_ASYNCH_IO and BACKUP_TYPE_IO_SLAVES to support asynchronous operations and improve the write capability.
2. To improve the disk reading capability, you can set DISKRATIO after the backup command to ensure that data is read from multiple disks and continuous data streams are ensured.
3. Set the buffer zone and parameter value to set LARGE_POOL_SIZE so that the backup can use a continuous buffer pool. By setting DB_FIL_DIRECT_IO_COUNT, you can improve the utilization of the buffer zone. If you use tape backup, you can also set BACKUP_TYPE_IO_SLAVES to improve the write capability of the tape.
4. Use parallel backup to open up multiple channels for parallel backup and recovery

Back up RMAN Database

RMAN databases also need to be backed up, but they are small and do not change frequently. Therefore, after each RMAN backup, you can use the following script to back up the RMAN database.

 
 

  
  
EXP pafile = exprman. SQL
  
  
Exprman. SQL is
  
  
USERID = RMAN/RMAN
  
  
Buffer= 32768
  
  
OWNER = RMAN
  
  
FILE = RMAN. DMP
  
  
ROWS = Y
  
  
GRANTS = Y
  
  
COMPRESS = Y
  
  
CONSISTENT = Y
 
 

Oracle backup using RMAN

Oracle EXP/IMP backup Overview

Importance of Oracle Database Backup

How to Implement ORACLE backup

Oracle backup command to use instances