> # 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 topics:

> - Information About the SAN Extension Tuner
> - Licensing Requirements for SAN Extension Tuner
> - Default Settings
> - Configuring the SAN Extension Tuner
> - Additional References

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