Red Hat GFS 5.2.1 -, Administrator'S Manual

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88 Chapter 9. Managing GFS
9.4.1. Setting Quotas
Two quota settings are available for each user ID (UID) or group ID (GID): a hard limit and a warn
limit .
A hard limit is the amount space that can be used. The file system will not let the user or group use
more than that amount of disk space. A hard limit value of zero means that no limit is enforced.
A warn limit is usually a value less than the hard limit. The file system will notify the user or group
when the warn limit is reached to warn them of the amount of space they are using. A warn limit value
of zero means that no limit is enforced.
Limits are set using the
gfs_quota
command. The command only needs to be run on a single node
where GFS is mounted.
9.4.1.1. Usage
Setting Quotas, Hard Limit
gfs_quota limit -u User -l Size -f MountPoint
gfs_quota limit -g Group -l Size -f MountPoint
Setting Quotas, Warn Limit
gfs_quota warn -u User -l Size -f MountPoint
gfs_quota warn -g Group -l Size -f MountPoint
User
A user ID to limit or warn. It can be either a user name from the password file or the UID number.
Group
A group ID to limit or warn. It can be either a group name from the group file or the GID number.
Size
Specifies the new value to limit or warn. By default, the value is in units of megabytes. The
additional
-k
,
-s
and
-b
flags change the units to kilobytes, sectors, and file-system blocks,
respectively.
MountPoint
Specifies the GFS file system to which the actions apply.
9.4.1.2. Examples
This example sets the hard limit for user
Bert
to 1024 megabytes (1 gigabyte) on file system
/gfs
.
gfs_quota limit -u Bert -l 1024 -f /gfs
This example sets the warn limit for group ID 21 to 50 kilobytes on file system
/gfs
.
gfs_quota warn -g 21 -l 50 -k -f /gfs