6.3 HP StoreAll 9300/9320 Storage Administrator Guide (AW549-96072, June 2013)

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 GUI, as
it does not trigger failover of file serving services.) The node will fail over to its backup.
2. Wait for the GUI to report that the rebooted node is Up.
3. From the GUI, failback the node, returning services to the node from its backup. Run the
following command on the backup node:
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 StoreAll 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 Fusion Manager, 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 a StoreAll client, use the following command:
/etc/init.d/ibrix_client [start | stop | restart | status]
Tuning file serving nodes and StoreAll clients
Typically, HP Support sets the tuning parameters on the file serving nodes during the cluster
installation and changes should be needed only for special situations.
CAUTION: The default values for the host tuning parameters are suitable for most cluster
environments. Because changing parameter values can alter file-system performance, HP
recommends that you exercise caution before implementing any changes, or do so only under the
guidance of HP technical support.
Host tuning changes are executed immediately for file serving nodes. For StoreAll clients, a tuning
intention is stored in the Fusion Manager. When StoreAll software services start on a client, the
client queries the Fusion Manager for the host tunings that it should use and then implements them.
If StoreAll software services are already running on a client, you can force the client to query the
Fusion Manager 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 StoreAll Linux clients by executing the
ibrix_lwhost command.
Tuning file serving nodes on the GUI
The Modify Server(s) Wizard can be used to tune one or more servers in the cluster. To open the
wizard, select Servers from the Navigator and then click Tuning Options from the Summary panel.
The General Tunings dialog box specifies the communications protocol (TCP or UDP) and the
number of admin and server threads.
Starting and stopping processes 109