Configuring The San Extension Tuner; About The San Extension Tuner - Cisco MDS 9000 series Configuration Manual

S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

Configuring the SAN Extension Tuner

The SAN Extension Tuner (SET) feature is unique to the Cisco MDS 9000 Family of switches. This
feature helps you optimize FCIP performance by generating either direct access (magnetic disk) or
sequential access (magnetic tape) SCSI I/O commands and directing such traffic to a specific virtual
target. You can specify the size of the test I/O transfers and how many concurrent or serial I/Os to
generate while testing. The SET reports the resulting I/Os per second (IOPS) and I/O latency, which
helps you determine the number of concurrent I/Os needed to maximize FCIP throughput.
This chapter includes the following sections:
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About the SAN Extension Tuner

SAN Extension Tuner is not supported on the Cisco Fabric Switch for HP c-Class BladeSystem, the
Note
Cisco Fabric Switch for IBM BladeCenter, and 16-Port Storage Services Node (SSN-16).
Note As of Cisco MDS SAN-OS Release 3.3(1a), SAN Extension Tuner is supported on the Multiservice
Module (MSM) and the Multiservice Modular Switch.
Applications such as remote copy and data backup use FCIP over an IP network to connect across
geographically distributed SANs. To achieve maximum throughput performance across the fabric, you
can tune the following configuration parameters:
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SET is implemented in IPS ports. When enabled, this feature can be used to generate SCSI I/O
commands (read and write) to the virtual target based on your configured options (see
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)
About the SAN Extension Tuner, page 3-1
License Prerequisites, page 3-3
Configuring the SAN Extension Tuner, page 3-3
Verifying the SAN Extension Tuner Configuration, page 3-9
Default Settings, page 3-10
The TCP parameters for the FCIP profile (see
more information).
The number of concurrent SCSI I/Os generated by the application.
The transfer size used by the application over an FCIP link.
C H A P T E R
"Window Management" section on page 2-14
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
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for
Figure 3-1).
3-1