If your primary objective is to control disk space allocation/usage, consider setting "tree" quotas on the top level Qtree and not be concerned with a user or group who accesses the data within the qtree. This might be a simpler solution.

Paul M. Brubaker, Jr. RIDS - Intel System Support AT&T Wireless - Harrisburg PA e-mail: paul.brubaker@attws.com office #: 717-526-5011 cell #: 717-578-2254

-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Steve Losen Sent: Thursday, September 23, 2004 8:15 AM To: Mike Langas; toasters@mathworks.com Subject: Re: group quotas with LDAP

I'm trying to set up group quotas on a qtree. I'm trying to use unix groups that are stored on an ldap server to control who is in each group. Has anyone done this before? Are there any tools available to

help me determine that LDAP is set up correctly?

Are you sure that group quotas are what you want? They may not work like you hope that they do.

In particular, a group quota does not limit the total disk space consumed by all the users who are members of the group.

Each file and directory on a filer has a group attribute. When using Unix style permissions, a file's group is a group id number (GID), which corresponds to the third field in a Unix /etc/group file. You can use the unix command 'ls -l filename' to see what group a file has.

A group quota simply limits the total size of all files that have that particular group attribute. It has nothing to do with the owner of the files.

I don't think that group quotas are particularly useful because users are often members of multiple groups and therefore they can create files with different group attributes. If user X is a member of group A and group B, then X can create a file and set its group to A and that file counts against the group quota for A. But X could create another file and set its group to B and that file counts against the group quota for B. Of course both files count against the user quota for X.

Steve Losen scl@virginia.edu phone: 434-924-0640

University of Virginia ITC Unix Support