6.0 HP StorageWorks X9000 File Serving Software CLI Reference (TA768-96040, October 2011)

ibrix_client on the X9000 clients, reboot the X9000 clients, or execute ibrix_lwhost
--a on the X9000 clients.
Table 2 File allocation policies
The X9000 Software selects the allocation policy.AUTOMATIC
Allocates files to the segment where its parent directory sits.DIRECTORY
Allocates files to the local segments for a file serving node.LOCAL
Allocates files to a randomly chosen segment among preferred segments. This is the
default policy.
RANDOM
Allocates files to preferred segments in segment order, returning to the first segment
(or the designated starting segment) when a file has been allocated to the last segment.
ROUNDROBIN
Allocates files to one segment until the segment’s storage limit is reached, and then
moves to the next segment as determined by the AUTOMATIC algorithm.
STICKY
Sets directory allocation policy only. Causes the directory allocation policy to revert
to its default, which is the policy set for file allocation. Use NONE only to set file and
directory allocation to the same policy.
NONE
For clusters with more than 16 file serving nodes, takes a subset of the servers to be
used for file creation and rotates this subset on a regular periodic basis. This policy
should be used only under the direction of HP technical support.
HOST_ROUNDROBI N_NB
Synopsis
Set an allocation policy:
ibrix_fs_tune -f FSNAME {-h HOSTLIST|-g GROUPLIST} -p POLICY [-S
STARTSEGNUM] [-R]
The policy is applied to the specified file serving nodes and X9000 clients (HOSTLIST) or hostgroups
(GROUPLIST) for file system FSNAME, starting at the segment with the most available storage.
To specify the starting segment for applying the policy, include the -S STARTSEGNUM option.
To set the policy for files, omit the -R option. To set the policy for directories, include the -R option.
Reset the specified hosts or hostgroups to the default allocation policy for the file system:
ibrix_fs_tune -f FSNAME {-h HOSTLIST|-g GROUPLIST} -p -U
Prefer a pool of segments for the specified hosts or hostgroups:
ibrix_fs_tune -f FSNAME {-h HOSTLIST|-g GROUPLIST} -s LVNAMELIST
The segments to be included in the pool are specified by logical volume name (LVNAMELIST).
To prefer a pool of segments for NFS/CIFS clients, specify only NFS/CIFS servers in the HOSTLIST.
To prefer a pool of segments for X9000 clients, either specify X9000 clients in the HOSTLIST, or
specify a hostgroup in the GROUPLIST. To prefer all X9000 clients, specify the clients hostgroup.
Prefer a pool of segments on specified file serving nodes or hostgroups in accordance with the -S
option:
ibrix_fs_tune -f FSNAME {-h HOSTLIST|-g GROUPLIST} -S
{SEGNUMLIST|ALL|LOCAL}
• SEGNUMLIST: Takes a list of segment names.
• ALL: A keyword that allows clients to write to any segment on the listed file serving nodes.
This restores the default segment preferences for the clients.
• LOCAL: A keyword that allows clients to write only to the local segments on the specified file
serving nodes.
54 X9000 File Serving Software commands