Intel 7xx Servers, 170 Servers, AS/400 RISC Server manual 14.1.5.1

14.1.5Comparing Current 2780/574F with the new 571E/574F and 571F/575B NOTE: iV5R3 has support for the features in this section but all of our performance measurements were done on iV5R4 systems. For information on the supported features see the IBM Product Announcement Letters.

A model 570 4 way system with 48 GB of mainstore memory was used for the following. In comparing the new 571E/574F and 571F/575B with the current 2780/574F IOA, the larger read and write cache available on the new IOA’s can have a very positive effect on workloads. Remember this workload is used to get a general comparison between new and current hardware and cannot predict what will happen with all workloads.

Also note the 571E/574F requires the auxiliary cache card to turn on RAID and the 571F/575B has the function included in its double-wide card packaging for better system protection. Understanding of the general results are intended to help customers gauge what might happen in their environments.

			2780/571E/571F 15 DASD RAID5
14.1.5.1	(sec)		2780/574F (15 DASD): IOP, RAID-5
			571E/574F (15 DASD): IOPLess, RAID-5
			571F/575B (15 DASD): IOPLess, RAID-5
	Time
		0.2
		0.15
	Response
		0.1
		0.05
	System	0
		0	2500	5000	7500	10000
			Workload Throughput

	(ms)		2780/571E/571F 15 DASD RAID5
			2780/574F (15 DASD): IOP, RAID-5
			571E/574F (15 DASD): IOPLess, RAID-5
	Time	40	571F/575B (15 DASD): IOPLess, RAID-5
14.1.5.2	Response	30
		20
		10
	DASD	0
		0	1,000	2,000	3,000	4,000
			Ops/Sec
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008

© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 197