User guide

6. ACTIVATING MULTIPATHD

multipathd is the daemon that will monitor device paths at intervals configured using the

device “polling_interval” directive in the /etc/multipath.conf file. Note that device path failover

is controlled by the “no_path_retry” directive in the event of a primary path failure. This

component is described in detail in later sections of this document. The multipathd path

checking service should be enabled on the server using the chkconfig program as shown below:

chkconfig multipathd on

6.1 VERIFYING THAT MULTIPATHD SERVICE IS CONFIGURED TO AUTO-START

The “--list” option to chkconfig will display the auto-start setting for each Linux Run Level:

chkconfig multipathd –-list

Sample Output:

multipathd 0:off 1:off 2:on 3:on 4:on 5:on 6:off

6.2 STARTING THE MULTIPATHD SERVICE

Reboot the host or run the service command to start the multipathd daemon:

service multipathd start