Ve Cpw Cost - IBM 170 Servers Manual

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
iscsi jumbo
1000 iscsi standard
IXS/IXA
900
external NICs
800
700
600
500
400
300
200
100
0
Transaction Size (bytes)
VE Internal (port based)
iscsi jumbo
1000
iscsi standard
IXS/IXA
900
external NICs
800
700
600
500
400
300
200
100
0
16 64 256
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
20.0
VE Internal (port based)
15.0
16
14
10.0
12
5.0
10
8
0.0
6
4
Transaction Size (bytes)
2
0
Transaction Size (bytes)
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
©
Copyright IBM Corp. 2008
1024 4096 16384
iscsi jumbo
iscsi standard
IXS/IXA
external NICs
iscsi jumbo
iscsi standard
IXS/IXA
Chapter 17 - Integrated BladeCenter and System x Performance
PP TCP Stream Windows to i5/OS
iscsi jumbo
1000
iscsi standard
IXS/IXA
900
external NICs
800
700
600
500
400
300
200
100
0
Transaction Size (bytes)
VEPhyp Stream TCP
iscsi jumbo
1000
iscsi standard
IXS/IXA
900
external NICs
800
700
600
500
400
300
200
100
0
16 64 256
Transaction Size (bytes)
PP TCP Stream Windows to i5/OS
40.0
35.0
VEPhyp Stream TCP
30.0
25.0
25
20.0
15.0
20
10.0
15
5.0
0.0
10
5
Transaction Size (bytes)
0
Transaction Size (bytes)
1024 4096 16384
iscsi jumbo
iscsi standard
IXS/IXA
external NICs
iscsi jumbo
iscsi standard
IXS/IXA
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