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15.10 Number of Processors Affect Performance
With the Large Database File workload, it is possible to fully feed two backup devices with a single
processor, but with the User Mix workload it takes 1+ processors to fully feed a backup device. A
recommendation might be 1 and 1/3 processors for each backup device you want to feed with User Mix
data.
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008 Chapter 15. Save/Restore Performance 253
0
50
100
150
200
GB/HR
Save Restore
Operation
.1 Processor to 2 Processors Backup Operations
(User Mix Workload) to Ultrium 3 Tape
520 2 way 16GB Memory 60 Dasd
.1 Processor
.2 Processor
.3 Processor
.5 Processor
1.0 Processor
2.0 Processors
420
430
440
450
460
470
480
490
500
GB/HR
Save Restore
Ope ration
.1 Processor to 2 Processors Backup Operations
(Large File Workload) to Ultrium 3 Tape
520 2 way 16GB Memory 60 Dasd
.1 Processor
.2 Processor
.3 Processor
.5 Processor
1.0 Processor
2.0 Processors
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