Intel AS/400 RISC Server ユーザーズマニュアル
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
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
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
environment. Software encryption has a significant impact on save times but only a minor impact to
restore times
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
©
Copyright IBM Corp. 2008
Chapter 15. Save/Restore Performance
263
Tape Backup Performance - Saves
0
100
200
300
400
500
600
700
1 GB Source File
12 GB User Mix
64 GB Large File
320 GB Large File
GB
/H
R
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
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
CPU Utilization during Saves
0
5
10
15
20
25
1 GB Source File
12 GB User Mix
64 GB Large File
320 GB Large File
%
C
P
U
U
sed
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
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