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How default quotas work
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You can use default quotas to apply a quota to all instances of a given quota type. For example, a default user quota affects all users on the system for the specified FlexVol volume or qtree. In addition, default quotas enable you to modify your quotas easily.
You can use default quotas to automatically apply a limit to a large set of quota targets without having to create separate quotas for each target. For example, if you want to limit most users to 10 GB of disk space, you can specify a default user quota of 10 GB of disk space instead of creating a quota for each user. If you have specific users for whom you want to apply a different limit, you can create explicit quotas for those users. (Explicit quotas—quotas with a specific target or list of targets—override default quotas.)
In addition, default quotas enable you to use resizing rather than reinitialization when you want quota changes to take effect. For example, if you add an explicit user quota to a volume that already has a default user quota, you can activate the new quota by resizing.
Default quotas can be applied to all three types of quota target (users, groups, and qtrees).
Default quotas do not necessarily have specified limits; a default quota can be a tracking quota.
A quota is indicated by a target that is either an empty string ("") or an asterisk (*), depending on the context:
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When you create a quota using the
volume quota policy rule createcommand, setting the-targetparameter to an empty string ("") creates a default quota.Learn more about
volume quota policy rule createin the ONTAP command reference. -
In the
volume quota policy rule createcommand, the-qtreeparameter specifies the name of the qtree to which the quota rule applies. This parameter is not applicable for tree type rules. For user or group type rules at the volume level, this parameter should contain "". -
In the output of the
volume quota policy rule showcommand, a default quota appears with an empty string ("") as the target.Learn more about
volume quota policy rule showin the ONTAP command reference. -
In the output of the
volume quota reportcommand, a default quota appears with an asterisk (*) as the ID and Quota Specifier.Learn more about
volume quota reportin the ONTAP command reference.
Default user quota example
The following quota rule uses a default user quota to apply a 50-MB limit on each user for vol1:
cluster1::> volume quota policy rule create -vserver vs0 -volume vol1 -policy-name default -type user -target "" -qtree "" -disk-limit 50m
cluster1::> volume quota policy rule show -vserver vs0 -volume vol1
Vserver: vs0 Policy: default Volume: vol1
Soft Soft
User Disk Disk Files Files
Type Target Qtree Mapping Limit Limit Limit Limit Threshold
----- -------- ------- ------- -------- ------- ------ ------- ---------
user "" "" off 50MB - - - -
If any user on the system enters a command that would cause that user's data to take up more than 50 MB in vol1 (for example, writing to a file from an editor), the command fails.
