6.2 HP IBRIX 9300/9320 Storage Administrator Guide (AW549-96049, December 2012)

Starting and stopping processes
You can start, stop, and restart processes and can display status for the processes that perform
internal IBRIX 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 an 9000 client, use the following command:
/etc/init.d/ibrix_client [start | stop | restart | status]
Tuning file serving nodes and 9000 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 9000 clients, a tuning
intention is stored in the Fusion Manager. When IBRIX 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
IBRIX 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 9000 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 91