Comparing 571E/574F And 571F/575B Iop And Iopless - IBM 170 Servers Manual

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
0.15
0.05
14.1.6.2
35
30
25
20
15
10
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
©
Copyright IBM Corp. 2008
IOP compared to IOPLess
571E/574F (15 - 35 GB DASD): IOP, RAID-5
571E/574F (15 - 35 GB DASD): IOPLess, RAID-5
0.2
0.1
0
0 2500
IOP compared to IOPLess
571E/574F (15 - 35 GB DASD): IOP, RAID-5
571E/574F (15 - 35 GB DASD): IOPLess, RAID-5
5
0
0 1000
Chapter 14 DASD Performance
5000
Workload Throughput
2000
Ops/Sec
7500 10000
3000 4000
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