| Component | Description |
|---|---|
dm_multipath kernel module
| Reroutes I/O and supports failover for paths and path groups. |
mpathconf utility
| Configures and enables device mapper multipathing. |
multipath command
|
Lists and configures multipath devices. Normally started up with /etc/rc.sysinit, it can also be started up by a udev program whenever a block device is added or it can be run by the initramfs file system.
|
multipathd daemon
|
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 file.
|
kpartx command
|
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 kpartx is provided in its own package, but the device-mapper-multipath package depends on it.
|