Intel 7xx Servers, 170 Servers, AS/400 RISC Server VE CPW Cost, PP TCP Stream i5/OS to Windows

than an IXS or IXA attached VE connection. “Stream” means that the data is pushed in one direction, with only the TCP acknowledge packets running in the other direction.

PP TCP Stream i5/OS to Windows PP TCP Stream Windows to i5/OS

	1000		iscsi jumbo
			iscsi standard																Throughput (MBits/sec)
Throughput (MBits/sec)	900		IXS/IXA
	800		external NICs
	700
	600
	500
	400
	300
	200
	100
	0
	6	32	4		8	256		2	1024			8	6			2		384	68
	1		6	2			1				4		409		9
				1			5			0				1					327
										2				8			6
						Transaction Size (bytes)											1

1000		iscsi jumbo
		iscsi standard
900		IXS/IXA
800		external NICs
700
600
500
400
300
200
100
0
16	32	64	128	256	512	4	8	6	2		4	8
						02	204	409	819		38	276
						1				16
												3

Transaction Size (bytes)

VE Internal (port based) VEPhyp Stream TCP

	1000	iscsi jumbo						1000	iscsi jumbo
		iscsi standard							iscsi standard
(MBits/sec)	900	IXS/IXA					(MBits/sec)	900	IXS/IXA
	800	external NICs						800	external NICs
	700							700
	600							600
Throughput	500						Throughput	500
	400							400
	300							300
	200							200
	100							100
	0							0
	16	64	256	1024	4096	16384		16	64	256	1024	4096	16384
			Transaction Size (bytes)							Transaction Size (bytes)

17.6.2 VE CPW Cost

CPW cost below is listed as CPW per Mbit/sec. For the point to point connection, the results are different depending on the direction of transfer. For connections between guest servers - the direction of transfer doesn’t matter to the results.

PP TCP Stream i5/OS to Windows

	25.0												iscsi jumbo
													iscsi standard
MBits/sec	20.0					VE Internal (port based) externalIXS/IXA										NICs
	15.0
		16												iscsi jumbo
	1014.0													iscsi standard
CPWper MBits/sec		12												IXS/IXA
		5.0
		10
		8
	per	0.0
		6		28	6	512		4	2048			6	8192		4	32768
	CPW	4	1		25		02				09			63
							1				4
														1
		2					Transaction Size (bytes)
		0
				8	256	512		24		48		96	8192		384	32768
			2
			1				0		0		0
							1		2		4			6
														1
							Transaction Size (bytes)

					PP TCP Stream Windows to i5/OS
	40.0											iscsi jumbo
	35.0											iscsi standard
												IXS/IXA
MBits/sec	30.0					VEPhyp Stream TCP external NICs
	20.0
	25.0											iscsi jumbo
	25
per	15.0											iscsi standard
												IXS/IXA
MBits/sec	20
CPW	10.0
	15.0
per	0.0
	10			8	6	2	024	048			6	2			84	32768
CPW			2		25	51				9		819	1
		1							0					3
	5						1	2	4				6
							Transaction Size (bytes)
	0
			8		256	2	1024	8			6	2			384	8
	1					51		04	40			19				27
		2								9			1			6
							Transaction Size (bytes)									3

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008	Chapter 17 - Integrated BladeCenter and System x Performance	290