RMAN to NAS & SSD steps ::
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RMAN to NAS tests:

1)      Check RMAN configs to remove RATE parm if any

2)      Check to insure MAXOPENFILES parm and MAXSETSIZE parm are not in place

3)      Reduce RMAN channels to 1 ( to get a base line number)

4)      Leave FILESPERSET at default level, which is 64.

5)      Perform backup/Observ backup time

6)      Iterate the above steps 1-5 modifying RMAN channels to 2, 4, 6 etc

7)      Check default # of write buffers/count & Perform restore operations and note Restore time.

8)      Increase write buffers/count and perform Restore operation & note time.

RMAN to SSD:

9)   Switch RMAN to point backups to SSD

10)  Set  #of RMAN channels set to 1.

11)  Leave FILESPERSET at default level, which is 64.

12)  Perform backup/Observ backup time

13)  Iterate the above steps 1-5 modifying RMAN channels to 2, 4, 6 etc

14)  Check default # of write buffers/count & Perform restore operations and note Restore time.

15)  Increase write buffers/count and perform Restore operation & note time.