Dm-Multipath Setup Overview - Red Hat DEVICE-MAPPER MULTIPATH 4.6 Configuration And Administration Manual

Component
daemon
multipathd
command
kpartx
Table 1.1. DM-Multipath Components

4. DM-Multipath Setup Overview

DM-Multipath includes compiled-in default settings that are suitable for common multipath
configurations. Setting up DM-multipath is often a simple procedure.
The basic procedure for configuring your system with DM-Multipath is as follows:
1. Install
device-mapper-multipath
2. Edit the
multipath.conf
• comment out the default blacklist
• change any of the existing defaults as needed
• save the configuration file
3. Start the multipath daemons.
4. Create the multipath device with the
Detailed setup instructions for several example multipath configurations are provided in see
Chapter 3, Setting Up
Description
program whenever a block device is added or it can be run by
the
initramfs
Monitors paths; as paths fail and come back, it may initiate
path group switches. Provides for interactive changes to
multipath devices. This must be restarted for any changes to
the
/etc/multipath.conf
Creates device mapper devices for the partitions on a device
It is necessary to use this command for DOS-based partitions
with DM-MP. The
the
device-mapper-multipath
rpm.
configuration file:
multipath
DM-Multipath.
DM-Multipath Setup Overview
file system.
file.
is provided in its own package, but
kpartx
package depends on it.
command.
5