Intel AS/400 RISC Server, 170 Servers, 7xx Servers manual 001 10000 20000 30000 40000 50000 60000

VIOS/IBM i operating system JS22 Express

DS4800 (90 DDMs)

Commercial Performance Workload

IBM i operating system .8 Processor VIOS .2 Processor

IBM i operating system 1.7 Processor VIOS .3 Processor

IBM i operating system 2.6 Processors VIOS .4 Processors

IBM i operating system 3.5 Processors VIOS .5 Processors

		10
Time		1
	(sec)
Response		0.1
		0.01
		0.001
		0	10000	20000	30000	40000	50000	60000
					Transactions/Minute

The chart above shows some basic performance scaling for 1, 2, 3 and 4 processors. For this comparison both partition measurements were done with the processors set up as shared, and with the IBM i operating system partition set to capped. The rest of the resources stay constant, which consists of 90 RAID1 DDMs in a DS4800 under 16 LUNs 2 GB of memory assigned to VIOS and 28 GB assigned to the IBM i operating system partition. Note that only 1 LPAR is running at the time of the experiment.

							VIOS/IBM i operating system JS22 Blade
									DS4800 (90 DDMs)
							Commercial Performance Workload
Time		0.031
DASD Response
	(Seconds)	0.021
		0.011
Average
		0.001
		0	500	1000	1500	2000	2500	3000	3500	4000	4500	5000	5500	6000	6500	7000	7500	8000	8500	9000
										ASP Throughput OP/S
								i5OS .8 Processor VIOS .2 Processor
								i5OS 1.7 Processor VIOS .3 Processor
								i5OS 2.6 Processors VIOS .4 Processors
								i5OS 3.5 Processors VIOS .5 Processors
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008

© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 223