HP StorageWorks Scalable File Share - Manual (Page 311)

modify commands A–17
on OST services. HP recommends that you enable the
extents
mount option on file
systems underlying OST services only—do not enable this mount option on MDS services.
• The setting for the
mballoc
option is determined by the file I/O pattern specified for the
file system (when a file system is created in HP SFS Version 2.2). Do not change the setting
for the
mballoc
option on an existing file system.
• The
acl
and
user_xattrs
options are supported for MDS services:
• The
acl
option must be enabled if Access Control Lists are to be used when the file system
is mounted on client nodes.
• The
user_xattrs
option must be enabled if extended attributes are to be used when the
file system is mounted.
• The interconnect used for file system I/O operations
When a file system is created, the default interconnect list is assigned to the file system. You can use
the
modify filesystem
command to add interconnects, or to restrict the list of interconnects for
the file system.
• Lustre timeout
The timeout is a reference time used by Lustre to time various operations. The default value when
creating a file system is 200 seconds.
Do not change the default Lustre timeout unless you are requested to do so by your HP Customer
Support representative.
• Quota options
Quotas ensure that users do not consume more than their allocated their disk consumption limit. If
quotas are enabled on a file system, HP strongly recommends that you use the default values for the
quota options and that you do not change the values unless you are requested to do so by your HP
Customer Support representative.
You can also use the
modify filesystem
command to rewrite the LDAP database where file system
configuration information is stored.
Syntax
Interactive mode
modify filesystem filesystem_name
Scripted mode
You can modify a file system in scripted mode by entering the
modify filesystem
command with
the parameters you want to change. The syntax for the script is as follows:
modify filesystem filesystem_name [add_ost=value] [stripe_size=value]
[stripe_count=value] [mount_point=value] [preferred_server=value]
[mount_opts=value[,value...];value[,value...]
|ost_mount_opts=value[,value...]
|mds_mount_opts=value[,value...]
[interconnect=value] [timeout=value] [write_ldap]
NOTE: The
write_ldap
option, if used, must be the last option in the list.