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The following chart shows two IBM i operating system partitions using 14GB of memory and
1.7 processors each served by 1 VIOS partition using 2GB of memory and .6 processors. The
Commercial Performance Workload was running the same amount of transactions on each of the
partitions for the same time intervals. Although there is an observed cost for VIOS to manage
multiple partitions, VIOS was able to balance services to the two partitions. Experimenting with
the number of processors and memory assigned to the partitions might yield a better environment
for other workloads.
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 226
VIOS/IBM i operation system, JS22, 2 Partition Experiments
Commercial Performance Workload
0.0001
0.1001
0.2001
0 10000 20000 30000 40000 50000 60000
Transactions/Minute
Response Time (Seconds)
1 of 2 i5/OS 1.7 Processor Partitions on a .6 Processor VIOS Partition Using 48 DS4800 DDMs
2 of 2 i5/OS 1.7 Processor Partitions on a .6 Processor VIOS Partition Using 48 DS4800 DDMs
1 Single i5?OS Partition 3.5 Processors on a .5 Processor VIOS Partition Using 96 4800 DDMs
VIOS/IBM i operation system, JS22, 2 Partition Experiments
Commercial Performance Workload
0.001
0.011
0.021
0.031
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000
ASP Throughput OP/S
Average DASD Response
Time (Seconds)
1 of 2 i5/OS 1.7 Processor Partitions on a .6 Processor VIOS Partition Using 48 DS4800 DDMs
2 of 2 i5/OS 1.7 Processor Partitions on a .6 Processor VIOS Partition Using 48 DS4800 DDMs
1 Single i5?OS Partition 3.5 Processors on a .5 Processor VIOS Partition Using 96 4800 DDMs