Cisco Cisco UCS B200 M3 Blade Server 백서
2 © 2014 Cisco and/or its affiliates . All rights reserved .
Overview
Cisco Unified Computing System
™
(Cisco UCS
®
) 2 .1 .2a introduces the fNIC Tunables feature, which provides the capability
to tune the fNIC Queue Depth and I/O Throttle Count parameters of the Cisco UCS Virtual Interface Card (VIC) Fibre Channel
network interface card (fNIC) driver in Linux and VMware ESX implementations . This guide provides an overview of these
two parameters and the methodologies and syntax for modifying their values . Prior to Cisco UCS 2 .1 .2a, both of these
parameters were statically set to industry best practice defaults, and these values are still recommended for the vast majority
of architectures . The ability to tune these parameters provides flexibility for those customers whose architectures may require
nondefault values . Modifying default values to specific solutions is beyond the scope of this guide .
nondefault values . Modifying default values to specific solutions is beyond the scope of this guide .
Audience
This document is intended for Cisco systems engineers and customers involved in systems administration and performance
engineering on Cisco UCS Linux and VMware ESX implementations . It assumes advanced knowledge and understanding of Linux
and VMware operating system configurations in the context of storage technologies .
engineering on Cisco UCS Linux and VMware ESX implementations . It assumes advanced knowledge and understanding of Linux
and VMware operating system configurations in the context of storage technologies .
Test Environment
Cisco UCS
Cisco UCS Manager (UCSM) 2 .1 .2a
(2) Cisco UCS 6248UP 48-Port Fabric Interconnects
(2) Cisco UCS 2208XP I/O Modules
(1) Cisco UCS 5108 Blade Server Chassis
(1) Cisco UCS B200 M3 Blade Server with UCS VIC 1240 modular LAN on motherboard (mLOM)
(1) Cisco UCS B200 M2 Blade Server with UCS VIC M81KR
fNIC Driver
1 .5 .0 .45 (minimum version)
fNIC Tunable Parameters
The two new fNIC tunable parameters introduced in UCSM 2 .1 .2a are Queue Depth and I/O Throttle Count . Definitions for each
of these parameters are as follows:
of these parameters are as follows:
•
Queue Depth: The total number of I/O requests that can be outstanding on a per-logical unit number (LUN) basis .
•
I/O Throttle Count: The total number of I/O requests that can be outstanding on a per-virtual host bus adapter (vHBA) basis .
Operating System Support
The Queue Depth and I/O Throttle Count tunable parameters are supported on the following operating systems:
• Red Hat Linux 6 .x (RHEL 6 .x)
• Red Hat Linux 5 .x (RHEL 5 .x)
• SUSE Linux Enterprise 11 (SLES 11)
• XenServer (XS)
• VMWare ESX 5 .x (ESX)
•
• Red Hat Linux 5 .x (RHEL 5 .x)
• SUSE Linux Enterprise 11 (SLES 11)
• XenServer (XS)
• VMWare ESX 5 .x (ESX)
•
Not Supported: VMware ESX 4 .x