6.1 HP IBRIX X9000 Network Storage System CLI Reference (TA768-96057, June 2012)

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.
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, lists the X9000 clients in HOSTLIST or specify a
hostgroup in the GROUPLIST. To prefer all X9000 clients, specify the clients hostgroup.
Prefer a tier for the specified hosts or hostgroups:
ibrix_fs_tune -f FSNAME {-h HOSTLIST | -g GROUPLIST} -t TIERNAME
Tune allocation policy storage settings globally on the specified file system:
ibrix_fs_tune -f FSNAME -O [-p POLICY] [-S STARTSEGNUM] [-P prealloc
(KB)] [-r readahead (KB)] [-N NFS readahead (KB)]
The following settings can be tuned:
• Default allocation policy for all hosts
• Default starting segment number for applying settings
• Number of KB to allocate for a file at one time (prealloc)
• Number of KB that X9000 Software will pre-fetch (readahead)
• Number of KB that X9000 Software will pre-fetch under NFS (NFS readahead)
The default for prealloc is 256 KB. The defaults for readahead and NFS readahead are
128 KB.
List preferred segments or allocation policy for the specified hosts, hostgroups, or file system:
ibrix_fs_tune -l [-h HOSTLIST | —g GROUPLIST] [-f FSNAME]
The -S option lists preferred segments. The -P option lists allocation policy.
List the preferred segments on the specified file serving nodes or hostgroups:
ibrix_fs_tune {-h HOSTLIST|-g GROUPLIST} -l -S
ibrix_fs_tune 63