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

The values that are restored depend on the values specified for the -h HOSTLIST command:
◦ File serving nodes. The default file serving node host tunings are restored.
◦ StoreAll clients. The host tunings that are in effect for the default clients host group are
restored.
◦ Hostgroups. The host tunings that are in effect for the parent of the specified host groups
are restored.
• To list host tuning settings on file serving nodes, StoreAll clients, and host groups, use the
following command. Omit the -h argument to see tunings for all hosts. Omit the -n argument
to see all tunings.
ibrix_host_tune -l [-h HOSTLIST] [-n OPTIONS]
• To set the communications protocol on nodes and host groups, use the following command.
To set the protocol on all StoreAll clients, include the -g clients option.
• ibrix_host_tune -p {UDP|TCP} {-h HOSTLIST| -g GROUPLIST}
• To set server threads on file serving nodes, host groups, and StoreAll clients:
ibrix_host_tune -t THREADCOUNT {-h HOSTLIST| -g GROUPLIST}
• To set admin threads on file serving nodes, host groups, and StoreAll clients, use this command.
To set admin threads on all StoreAll clients, include the -g clients option.
ibrix_host_tune -a THREADCOUNT {-h HOSTLIST| -g GROUPLIST}
Tuning StoreAll clients locally
Linux clients. Use the ibrix_lwhost command to tune host parameters. For example, to set the
communications protocol:
ibrix_lwhost --protocol -p {tcp|udp}
To list host tuning parameters that have been changed from their defaults:
ibrix_lwhost --list
See the ibrix_lwhost command description in the HP StoreAll Storage CLI Reference Guide
for other available options.
Windows clients. Click the Tune Host tab on the Windows StoreAll client GUI. Tunable parameters
include the NIC to prefer (the default is the cluster interface), the communications protocol (UDP
or TCP), and the number of server threads to use. See the online help for the client if necessary.
Managing segments
When a file system is created, the servers accessing the file system are assigned ownership of the
storage segments used for the file system. Each server is responsible for managing the segments
it owns.
When the cluster is expanded, the StoreAll software attempts to maintain proper load balancing
and utilization in the following ways:
• When servers are added, ownership of the existing segments is redistributed among the
available servers.
• When storage is added, ownership of the new segments is distributed among the available
servers.
Managing segments 113