Use one of the following schemes for the reboot:
•
Reboot the file serving nodes one-at-a-time.
•
Divide the file serving nodes into two groups, with the nodes in the first group having backups
in the second group, and the nodes in the second group having backups in the first group.
You can then reboot one group at-a-time.
To perform the rolling reboot, complete the following steps on each file serving node:
1.
Reboot the node directly from Linux. (Do not use the "Power Off" functionality in the
management console, as it does not trigger failover of file serving services.) The node will fail
over to its backup.
2.
Wait for the management console to report that the rebooted node is Up.
3.
From the management console, failback the node, returning services to the node from its
backup. Run the following command on the backup node:
<installdirectory>/bin/ibrix_server -f -U -h HOSTNAME
HOSTNAME
is the name of the node that you just rebooted.
Starting and stopping processes
You can start, stop, and restart processes and can display status for the processes that perform
internal X9000 Software functions. The following commands also control the operation of PostgreSQL
on the machine. The PostgreSQL service is available at
/usr/local/ibrix/init/
.
To start and stop processes and view process status on the management console, use the following
command:
/etc/init.d/ibrix_fusionmanager [start | stop | restart | status]
To start and stop processes and view process status on a file serving node, use the following
command. In certain situations, a follow-up action is required after stopping, starting, or restarting
a file serving node.
/etc/init.d/ibrix_server [start | stop | restart | status]
To start and stop processes and view process status on an X9000 client, use the following command:
/etc/init.d/ibrix_client [start | stop | restart | status]
Tuning file serving nodes and X9000 clients
The default host tuning settings are adequate for most cluster environments. However, HP Support
may recommend that you change certain file serving node or X9000 client tuning settings to
improve performance.
Host tuning changes are executed immediately for file serving nodes. For X9000 clients, a tuning
intention is stored in the management console. When X9000 Software services start on a client,
the client queries the management console for the host tunings that it should use and then implements
them. If X9000 Software services are already running on a client, you can force the client to query
the management console by executing
ibrix_client
or
ibrix_lwhost --a
on the client, or
by rebooting the client.
You can locally override host tunings that have been set on clients by executing the
ibrix_lwhost
command.
All management console commands for tuning hosts include the
-h HOSTLIST
option, which
supplies one or more hostgroups. Setting host tunings on a hostgroup is a convenient way to tune
58
Maintaining the system
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