The vFiler unit administrator specifies the size of each quota in the vFiler unit’s /etc/quotas file. The vFiler unit administrator tracks and limits the amount of disk space and the number of files each user, group, or qtree uses.
If a qtree owned by the vFiler unit resides on a volume owned by the hosting storage system, then the hosting storage system administrator can also specify a quota for the qtree in the hosting storage system’s /etc/quotas file. The following example shows how qtree quota on the hosting storage system affects a vFiler unit qtree.
Assume that the /vol/vol1/qtree1 qtree is a storage unit of the vFiler unit, and the /vol/vol1 volume is owned by the hosting storage system.
In the /etc/quotas file of the vFiler unit, the vFiler unit administrator specifies that this qtree is limited to 20 GB of disk space. In the /etc/quotas file of the hosting storage system, the storage system administrator can specify can specify the disk space limit for the qtree as 10 GB. Therefore, if quotas are turned on from the hosting storage system for the /vol/vol1 volume, the qtree cannot exceed the limit in either of the /etc/quotas files, whichever is lower. In this example, the qtree cannot exceed 10 GB.
The hosting storage system administrator controls the usage of quotas on each volume that the storage system owns by using the quota allow and quota disallow commands. When the hosting storage system administrator allows quotas, the vFiler unit administrator can turn quotas on or off on the vFiler units by using the quota on and quota off commands, respectively.
For more information about quotas, see the Data ONTAP Storage Management Guide for 7-Mode.