GPFS: Administration and Programming Reference - IRA Home

To disable quota management:
1. Issue the mmchfs command with the -Q no option specified.
2. Unmount the file system everywhere.
3. Remount the file system deactivating the quota files. All subsequent mounts obey the new quota
setting.
Note: If you do not unmount the file system everywhere, you will create conflicting quota usage where
existing mounts follow the old quota values and new mounts follow the new quota values.
See the “mmcheckquota Command” on page 98, the “mmchfs Command” on page 103, the “mmcrfs
Command” on page 120, and the “mmedquota Command” on page 171 for complete usage information.
For additional information on quotas, see the General Parallel File System: Concepts, Planning, and
Installation Guide.
Default quotas
Applying default quotas provides for minimum quota limits for all new users, groups of users, or filesets for
a file system. If default quota values for a file system are not enabled, a new user, group of users or fileset
for that file system has a quota limit of zero, which establishes no limit to the amount of space that they
can use.
To enable default quota values for a file system:
1. The file system must have been created or changed with the -Q yes option. See the mmcrfs and
mmchfs commands.
2. Default quotas are enabled with the mmdefquotaon command.
3. Default quota values are established for new users, groups, and filesets for a file system, by issuing
the mmdefedquota command.
To apply different quota values for a particular user, group, or fileset, the system administrator must
explicitly configure those values using the mmedquota command. If after explicit quotas for a user, group,
or filesets have been established, it is necessary to reapply the default limits for that user, group, or fileset,
you must issue the mmedquota -d command.
The default quotas can be deactivated by issuing the mmdefquotaoff command.
For example, to create default quotas for users of the file system fs0, enter:
mmdefedquota -u fs0
A prompt in your default editor appears:
*** Edit quota limits for USR DEFAULT entry
NOTE: block limits will be rounded up to the next multiple of the block size.
block units may be: K, M, or G.
fs1: blocks in use: 0K, limits (soft = 0K, hard = 0K)
inodes in use: 0, limits (soft = 0, hard = 0)
See the “mmdefedquota Command” on page 139, “mmdefquotaoff Command” on page 141,
“mmdefquotaon Command” on page 143, and “mmedquota Command” on page 171 commands for
complete usage information.
Explicitly establishing and changing quotas
Use the mmedquota command to explicitly establish or change file system quota limits for users, groups
of users, or filesets. When setting quota limits for a file system, replication within the file system should be
considered. GPFS quota management takes replication into account when reporting on and determining if
quota limits have been exceeded for both block and file usage. In a file system that has either type of
38 GPFS: Administration and Programming Reference