Users Guide

EqualLogic Host Performance and Tuning Suite (eqltune)
The EqualLogic Host Performance and Configuration Tuning Suite (eqltune) verifies a Linux system for optimal iSCSI performance
configuration. The suite analyzes a large number of system settings for compliance with Dellʼs recommended practices, categorizing them
into four categories:
• Critical—The setting must be changed to avoid serious performance issue.
• Warning—The setting should be changed to enhance performance.
• Suggestion—The setting could be changed. Depending on the actual patterns of data usage, end-users might want to experiment
with a range of values to find a more optimal configuration.
• OK—The setting matches Dellʼs recommendation.
While most messages are informational, you should examine Critical and Warning messages carefully (see Evaluating Output Information).
The eqltune utility runs in three modes: check mode, list mode, or fix mode. Check mode (eqltune check) is the default unless other
commands are specified. In this mode, parameters are verified against a recommended range of values. Check mode produces critical,
warning, suggestion, or OK messages with recommendations for changing values outside Dellʼs recommended settings. List mode
(eqltune list) lists all parameters checked by the eqltune utility but does not perform the verification/recommendation analysis. Fix
mode (eqltune fix) repairs any issues identified in the analysis phase (running eqltune check).
Features
The eqlconfig utility performs a full or partial configuration of HIT/Linux components. It provides the following features:
• Invokes the eqltune utility (see EqualLogic Host Performance and Tuning Suite (eqltune)) to detect any critical configuration issues in
the system. If any are found, it asks you if you want to correct the issues before proceeding. The default (Yes) fixes configuration
errors and completes the installation.
• Runs through the configuration process for Multipath I/O and ASM/LE. For MPIO configurations, eqlconfig reviews the network
protocol and subnets, and presents available subnets or lets you choose individual NICs, and then starts the services. In the process, it
merges the configuration files.
• Provides options for you to return to the configuration process anytime and choose to configure MPIO or ASM separately. By default,
the eqlconfig utility runs through the configuration of all components.
• When enabling EqualLogic Multipath I/O for the first time, assists you in migrating a live system to start using MPIO devices.
• Lets you select the defaults by simply hitting Enter to all questions or run in noninteractive mode where all defaults are automatically
selected as the eqlconfig utility executes.
eqlconfig Command Syntax
The command syntax is as follows:
eqlconfig [parameter]
--version
--help | -h
--all
--migrate | -M
--mpio
--asm
--noninteractive | -n
--file filename | -f
The following table describes the eqlconfig utility’s parameters:
Table 3. eqlconfig Parameters
Parameter Abbr. Argument Description
--version none none Shows the version number of the utility and exits
--help -h none Displays command-line parameters for eqlconfig
--all none none Configures all components
--migrate -M none Assists in migrating a live system to start using
EqualLogic MPIO devices. For more information, see
Migrating to HIT/Linux Multipath I/O.
18 Installing and Configuring HIT/Linux