Configuration File Devices - Red Hat ENTERPRISE LINUX 5 DM MULTIPATH Configuration And Administration Manual

Chapter 4. The DM-Multipath Configuration File
Attribute
flush_on_last_del
rr_min_io
mode
uid
gid
Table 4.2. Multipath Attributes
The following example shows multipath attributes specified in the configuration file for two specific
multipath devices. The first device has a WWID of 3600508b4000156d70001200000b0000 and a
symbolic name of yellow.
The second multipath device in the example has a WWID of 1DEC_____321816758474 and a
symbolic name of red. In this example, the rr_weight attributes is set to priorities.
multipaths {
multipath {
wwid
alias
path_grouping_policy
path_checker
path_selector
failback
rr_weight
no_path_retry
}
multipath {
wwid
alias
rr_weight
}
}

4.5. Configuration File Devices

Table 4.3, "Device Attributes"
in the devices section of the multipath.conf configuration file. These attributes are used by DM-
Multipath unless they are overwritten by the attributes specified in the multipaths section of the
18
Description
A value of queue indicates that queuing should not stop until the
path is fixed.
(RHEL 5.3 and later) If set to yes, the multipathd daemon will
disable queueing when the last path to a device has been deleted.
The default value is no.
Specifies the number of I/O requests to route to a path before
switching to the next path in the current path group.
(RHEL 5.3 and later) The mode to use for the multipath device
nodes, in octal. The default value is determined by the process.
(RHEL 5.3 and later) The user ID to use for the multipath device
nodes. You must use the numeric user ID. The default value is
determined by the process.
(RHEL 5.3 and later) The group ID to use for the multipath device
nodes. You must use the numeric group ID. The default value is
determined by the process.
3600508b4000156d70001200000b0000
yellow
multibus
readsector0
"round-robin 0"
manual
priorities
5
1DEC_____321816758474
red
priorities
shows the attributes that you can set for each individual storage device