Apple Xsan 1.0 - Manual (Page 61)

Chapter 4 Managing Clients and Users 61
Setting User and Group Quotas
You can set quotas to manage the amount of storage available to a user or group.
To set storage quotas for users and groups:
1 If the volume is not already started, start it.
Open Xsan Admin, select the volume, and click Start Volume.
2 In Xsan Admin, select the volume and click Quotas.
3 If the user or group is not in the list, click the Add (+) button next to the list and drag
users or groups from the drawer to the list.
If the user or group doesn’t appear in the drawer, open Directory Access and make sure
the computer is using the correct directory for authentication.
4 Select the user or group in the list and type their hard quota, soft quota, and grace
period in the fields below the list.
5 Click Save to enforce the specified quotas or Revert to restore the last saved values.
From the Command Line
You can also set user quotas using the
cvadmin quotas set command in Terminal.
For more information, see the cvadmin man page or “Viewing or Changing Volume and
Storage Pool Settings (cvadmin)” on page 85.
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 in a SAN. A user for whom no quotas
are 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 is “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. If a user tries to
exceed his or her hard quota, he or she sees a message containing the error code -1425.
Grace Period
A user or group can exceed their soft quota without penalty as long as they return
below their soft quota within the grace period you specify.
LL0192.book Page 61 Thursday, July 29, 2004 5:20 PM