Apple Xsan 2 (Third Edition) - Manual (Page 80)

To remove a quota:
Select the user or group and choose Delete Quota from the Action (gear) pop-up
m
menu.
If your Xsan computers connect to another Mac OS X Server for user and group
accounts, use Workgroup Manager or Server Preferences to create users and groups
as needed.
If existing users and groups aren’t listed when you click the Add button, open System
Preferences > Accounts > Login Options > Edit Network Account Server on your
computer and make sure it’s connected to the correct server for authentication.
All computers in the SAN should use the same directory service.
From the Command Line
You can also set user quotas using the
cvadmin quotas set command in Terminal.
For information, see the cvadmin man page or “Viewing or Changing Volume and
Storage Pool Settings (cvadmin)” on page 111.
About Xsan Quotas
Xsan enforces two disk space quotas for each user or group you choose to restrict: a
soft quota and a hard quota. You can set these in combination to establish clear limits
on the amount of storage a user or group can use, while still allowing temporary
access to extra space for unexpected storage needs. You specify quotas individually for
each volume on a SAN. A user who has no quotas specified can use all available space
on a volume.
Soft Quota
The soft quota is the maximum space a user or group is expected to occupy on a
regular basis. It’s soft because it can be exceeded by an amount up to the hard quota
for a grace period that you specify.
Hard Quota
The hard quota is an absolute limit on the space a user or group can occupy. Users are
prevented from using more space than specified by their hard quota.
Grace Period
A user or group can exceed the soft quota without penalty as long as each returns
below the soft quota within the grace period you specify.
Soft Quotas Change to Hard Quotas
If a user or group exceeds the soft quota for a time longer than the grace period, the
soft quota is changed to a hard quota. The user or group can’t save additional data
on the volume until the user or group members delete enough old files to bring their
usage below the soft quota.
80 Chapter 5 Managing Clients and Users