About xsan quotas – Apple Xsan 2 User Manual
Page 102
Remove a quota:
Select the user or group and choose Delete Quota from the Action pop-up menu (gear).
m
If your Xsan computers connect to another Mac server for user and group accounts,
use the Server app or the Workgroup Manager app to create users and groups as
needed. The Server app is included with Mac OS X Lion Server. Workgroup Manager is
available for Lion Server as part of the Server Admin Tools, which you can download
from the AppleCare Support Downloads website at
.
If existing users and groups aren’t listed when you click the Add button, open the
Users & Groups pane of System Preferences on your computer and make sure it’s
connected to the correct network account server (directory server).
All computers in the SAN should use the same directory server.
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 “View or change volume and storage pool
settings (cvadmin)” on page 145.
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 the available
space on a volume.
Soft quota
The soft quota is the maximum amount of 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 amount of space a user or group can
occupy. Users are prevented from using more space than specified by their hard quota.
Grace period
Users and groups can exceed the soft quota without penalty, as long as each returns
below the soft quota within the grace period you specify.
102
Chapter 6
Manage clients and users