Cisco UCS 5108 User Manual

Guide
January 2014
Cisco UCS fNIC Tunables
Contents
Overview .................................................................................. 2
Audience.................................................................................. 2
Test Environment............................................................................ 2
Cisco UCS ..................................................................................2
fNIC Driver ..................................................................................2
fNIC Tunable Parameters ...................................................................... 2
Operating System Support .................................................................... 2
Install fNIC Drivers ........................................................................... 3
Configuring fNIC Tunables ..................................................................... 3
LUN Queue Depth ............................................................................3
Displaying fnic_max_qdepth Parameter Value ......................................................4
Boot-Time Configuration ......................................................................5
Load-Time Configuration ......................................................................5
Run-Time Configuration .......................................................................5
IO Throttle Count .............................................................................6
UCSM Non-Standalone I/O Throttle Count Configuration ..............................................7
Cisco Integrated Management Controller Standalone I/O Throttle Count Configuration . . . . . . . . . . . . . . . . . . . . . . . .8
References ................................................................................ 8
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Cisco UCS 5108 Specifications

General

Number of Blade Slots	8
I/O Module Bays	2
Supported Blade Servers	Cisco UCS B-Series Blade Servers
Power Supply Options	Up to four hot-swappable power supplies (AC or DC)
Cooling	Redundant hot-swappable fans
Management	Cisco UCS Manager
Blade Slots	8
Fabric Interconnects	Cisco UCS 6100 or 6200 Series
Power Supplies	Up to 4 hot-pluggable power supplies
Form Factor	6RU rack-mountable

Summary

Overview of Cisco UCS fNIC Tunables

Audience for fNIC Tunables Guide

Test Environment Setup

fNIC Driver Information

fNIC Tunable Parameters Explained

Install fNIC Drivers

Configuring fNIC Tunables

LUN Queue Depth Configuration

Total I/O requests that can be outstanding on a per-logical unit number (LUN) basis.

Displaying fnic_max_qdepth Parameter Value

Commands to display current and postconfiguration values of the fnic_max_qdepth parameter.

Boot-Time Configuration for fnic_max_qdepth

Configuring fnic_max_qdepth by modifying kernel line or initrd, requires reboot for effect.

Load-Time Configuration for fnic_max_qdepth

Configuring fnic_max_qdepth using modprobe or insmod commands, not persistent across reboots.

Run-Time Configuration for fnic_max_qdepth

Configuring fnic_max_qdepth via sysfs entry for immediate, non-persistent effect on new LUNs.

IO Throttle Count Parameter

UCSM Non-Standalone I/O Throttle Count Configuration

CIMC Standalone I/O Throttle Count Configuration

References for Cisco UCS fNIC Tunables