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21-2
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-8007-01, Cisco Fabric Manager Release 3.x
Chapter 21 Configuring the SAN Extension Tuner
Prerequisites
Figure 21-1 SCSI Command Generation to the Virtual Target
The SAN extension tuner assists with tuning by generating varying SCSI traffic workloads. It also
measures throughput and response time per I/ O over an FCIP link.
SAN Extension Tuner Setup
Figure 21-2 provides a sample physical setup in which the virtual N ports are created on ports that are
not a part of the FCIP link for which the throughput and latency is measured.
Figure 21-2 N Port Tuning Configuration Example
Data Pattern
By default, the virtual N ports generate data using an all-zero pattern. You can optionally select a file as
the data pattern to be generated one of three locations: the bootflash: directory, the volatile: directory, or
the slot0: directory. This option is especially useful when testing compression over FCIP links. You can
also use Canterbury corpus or artificial corpus files for benchmarking purposes.
Prerequisites
To use the SAN extension tuner, you need to obtain the SAN_EXTN_OVER_IP license (see Chapter 9,
“Obtaining and Installing Licenses”).
FCFC
WAN/MAN
IPS
fabric
IPS
fabric
Virtual initiator Virtual target
Read/Write I/O
120493
Cisco MDS Switch Cisco MDS Switch
FCIP
link
GE 3/4
GE 3/3
120495
GE 2/4
GE 2/3
SAN Extension Tuner
N ports