Intel 7xx Servers, 170 Servers, AS/400 RISC Server manual 700

15.18 BRMS-Based Save/Restore Software Encryption and DASD-Based ASP Encryption

The Ultrium-3 was used in the following experiments, which attempt to characterize the effects of BRMS-based save /restore software encryption and DASD-based ASP encryption. Some of the newer tape drives offer hardware encryption as an option but for those who are not looking to upgrade or invest in these tape units at this time, software encryption can be a fair solution. In the experiments we used full processors that were dedicated to the partition. We used a 9406-MMA 4 way partition and a 9406-570 4 way partition. Both systems had 40 GB of main memory. The workload data was located on a single user ASP with 36 - 70GB 15K RPM DASD attached through a 571F IOA. The experiments were not set up to show the best possible environment or to take into account all of the possible hardware environments, instead these experiments were an attempt to portray some of the differences customers might observe if they choose software encryption as a back up strategy over their current non-encrypted environment. Software encryption has a significant impact on save times but only a minor impact to restore times

Tape Backup Performance - Saves

9406-MMA-4w ay Encrypted ASP SAVLIBBRM NO Softw are Encryption

9406-MMA-4w ay Encrypted ASP SAVLIBBRM With Softw are Encryption

9406-MMA-4w ay NON Encrypted ASP SAVLIBBRM NO Softw are Encryption

9406-MMA-4w ay NON Encrypted ASP SAVLIBBRM With Softw are Encryption

9406-570-4w ay NON Encrypted ASP SAVLIBBRM NO Softw are Encryption 9406-570-4w ay NON Encrypted ASP SAVLIBBRM With Softw are Encryption

	700
	600
GB/HR	500
	400
	300
	200
	100
	0

1 GB Source File 12 GB User Mix 64 GB Large File 320 GB Large File

CPU Utilization during Saves

9406-MMA-4w ay %CPU Used Encrypted ASP SAVLIBBRM NO Softw are Encryption

9406-MMA-4w ay %CPU Used Encrypted ASP SAVLIBBRM With Softw are Encryption

9406-MMA-4w ay %CPU Used NON Encrypted ASP SAVLIBBRM NO Softw are Encryption

9406-MMA-4w ay %CPU Used NON Encrypted ASP SAVLIBBRM With Softw are Encryption

9406-570-4w ay %CPU Used NON Encrypted ASP SAVLIBBRM NO Softw are Encryption 9406-570-4w ay %CPU Used NON Encrypted ASP SAVLIBBRM With Softw are Encryption

Used	25
	20
	15
%CPU
	10
	5
	0

1 GB Source File 12 GB User Mix 64 GB Large File 320 GB Large File

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008	Chapter 15. Save/Restore Performance	263