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14.5.1.3.2 BladeCenter S and JS12 Express
The IBM i operating system is now supported on a JS12 Express in a BladeCenter S. The
system is limited to 12 SAS DASD and the following charts try to characterize the performance
we achieved during experiments with the Commercial Performance Workload in the IBM lab.
Using a JS22 Express in a BladeCenter H connected to a DS4800, we limited the resources in
order to get a comparison to the SAS DASD used in the BladeCenter S.
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 227
BladeCenter S - 12 internal SAS DASD
BladeCenter H fibre chanbnel attached DS4800 using 12 DDMs
P6 M25 with 12 internal SAS DASD on the 572C(no cache) and 57B8 (cache) IOAs
0.001
0.01
0.1
1
10
0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000
Transactions/Minute
Response Time (Seconds)
BladeCenter S JS12 12 BladeCenter SAS DASD IBM i operating system miroring 16GB Memory 1.8 Processors i5 .2 VIOS
BladeCenter H JS22 12 DS4800 DASD RAID1 done on the DS4800 16GB Memory 1.8 Processors i5 .2 VIOS
M25 572C 12 SAS Dasd Mirrored 16 GB memory 2 processors
M25 57B8 12 SAS DASD Mirrored 16 GB memory 2 Processors
BladeCenter S - 12 internal SAS DASD
BladeCenter H fibre chanbnel attached DS4800 using 12 DDMs
P6 M25 with 12 internal SAS DASD on the 572C(no cache) and 57B8 (cache) IOAs
0.001
0.011
0.021
0.031
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
ASP Throughput (OP/S)
Average DASD Response Time (Seconds)
BladeCenter S JS12 12 BladeCenter SAS DASD IBM i operating system miroring 16GB Memory 1.8 Processors i5 .2 VIOS
BladeCenter H JS22 12 DS4800 DASD RAID1 done on the DS4800 16GB Memory 1.8 Processors i5 .2 VIOS
M25 572C 12 SAS Dasd Mirrored 16 GB memory 2 processors
M25 57B8 12 SAS DASD Mirrored 16 GB memory 2 Processors