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14.1.6 Comparing 571E/574F and 571F/575B IOP and IOPLess
In comparing IOP and IOPLess runs we did not see any significant differences, including the
system CPU used. The system we used was a model 570 4 way, on the IOP run the system CPU
was 11.6% and on the IOPLess run the system CPU was 11.5%. The 571E/574F and
571F/575B display similar characteristics when comparing IOP and IOPLess environments, so
we have chosen to display results from only the 571E/574F.
14.1.6.1
14.1.6.2
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 198
IOP compared to IOPLess
0
0.05
0.1
0.15
0.2
0 2500 5000 7500 10000
571E/574F (15 - 35 GB DASD): IOP, RAID-5
571E/574F (15 - 35 GB DASD): IOPLess, RAID-5
Workload Throughput
System Response Time (sec)
IOP compared to IOPLess
0
5
10
15
20
25
30
35
0 1000 2000 3000 4000
571E/574F (15 - 35 GB DASD): IOP, RAID-5
571E/574F (15 - 35 GB DASD): IOPLess, RAID-5
Ops/Sec
DASD Response Time (ms)