IBM General Parallel File System for AIX: Administration and Programming Reference

Installing and uninstalling GPFS quotas

To install quotas on a new GPFS file system:

1. Specify the -Q yes option on the mmcrfs command. This option automatically activates quota enforcement whenever the file system is mounted.
2. Mount the file system.
3. Issue the mmedquota command to explicitly set quota values for users or groups (see Establishing and changing quotas).
4. Issue the mmquotaon command to activate quota enforcement (see Activating quota enforcement).

To install quotas on an existing GPFS file system:

1. Specify the -Q yes option on the mmchfs command. This option automatically activates quota enforcement whenever the file system is mounted.
2. Remount the file system.
3. Compile inode and disk block statistics using the mmcheckquota command (see Checking quotas). The values obtained should be referenced in order to establish realistic quota values when issuing the mmedquota command.
4. Issue the mmedquota command to explicitly set quota values for users or groups (see Establishing and changing quotas).
5. Issue the mmquotaon command to activate quota enforcement (see Activating quota enforcement).

You may find it helpful to maintain a quota prototype, a set of limits that you can apply by name to any user or group without entering the values manually. This makes it easy to set the same limits for all. The mmedquota command includes an option for naming a prototypical user or group upon which limits are to be based.

To uninstall quotas, issue the mmchfs command with the -Q no option specified.

As an alternative to explicitly setting quota values for users or groups, default quota values may be established for new users or groups of a file system (see Default quotas).

See the mmcheckquota Command, the mmchfs Command, the mmcrfs Command, and the mmedquota Command for complete usage information. For additional information on quotas, see the IBM General Parallel File System for AIX: Concepts, Planning, and Installation Guide .