HP VMA SAN Installation And Configuration Manual page 67

In the above example, support for Memory Array devices was added. When configuring this
file, pay particular attention to the following:
path_grouping_policy should be set to group_by_serial
•
getuid_callout should be set
•
path_checker should be tur(TEST_UNIT_READY)
•
failback should be immediate
•
rr_weight should be uniform since weights are not assigned to the individual paths
•
no_path_retry should be set to immediately bring path back online
•
rr_min_io should be set to 4, but can be subject to change depending on the environment and
•
workload.
Save the
2.
Configuring the Multipath Daemon
This section demonstrates how to configure the multipath daemon (
when the system boots up.
To configure the multipath daemon, do the following:
Use the
1.
Restart the multipath service, using the
2.
Verify that the multipath service is running, using the
3.
The following example demonstrates these steps for a single LUN that is accessible through two
Fibre Channel (FC) ports that are multipathed into a single multipath device (
mpath1
# chkconfig -a multipathd
# service multipathd restart
# multipath -ll
mpath176 (36001b97074dc2dff74dc2dfe97c7089e) dm-0 VIOLIN, ARRAY
[size=1.0G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 5:0:2:1 sdl 8:176
\_ 5:0:3:1 sdm 8:192
mpath11 (36001b97074dc2dff74dc2dfeb6ecc00a) dm-1 VIOLIN, ARRAY
[size=1.0G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 5:0:2:2 sdx 65:112 [active][ready]
\_ 5:0:3:2 sdy 65:128 [active][ready]
AM456-9025A
multipath.conf
file and proceed with
chkconfig
command to add (
).
[active][ready]
[active][ready]
HP VMA SAN Gateway Installation and Configuration Guide
Configuring the Multipath
-a
) the multipath daemon (
service restart
command.
multipath -ll
Daemon.
multipathd
) so that it starts
multipathd
) as a service.
command.
/dev/mapper/
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