zfs discuss - Nov 2009 - Setting default user/group quotas?

Hi,

first of all, many thanks to those who made user/group quotas possible. This
is a huge improvement for many users of ZFS!

While presenting on this new future at the Munich OpenSolaris User Group meeting
yesterday, a question came up that I couldn''t find an answer for: Can
you set
a default user/group quota?

Apparently,

   zfs set userquota at user1=5G tank/home/user1

is the only way to set user quotas and the "@user1" part seems to be
mandatory,
at least according to the snv_126 version of the ZFS manpage. According to my
attempts with ZFS:

   The {user|group}{used|quota}@ properties must be appended with
   a user or group specifier of one of these forms:
       POSIX name      (eg: "matt")
       POSIX id        (eg: "126829")
       SMB name at domain (eg: "matt at sun")
       SMB SID         (eg: "S-1-234-567-89")

Imagine a system that needs to handle thousands of users. Setting quota
individually for all of these users would quickly become unwieldly, in a similar
manner to the unwieldliness that having a filesystem for each user presented.

Which was the reason to introduce user/group quotas in the first place.

IMHO, it would be useful to have something like:

   zfs set userquota=5G tank/home

and that would mean that all users who don''t have an individual user
quota
assigned to them would see a default 5G quota.

I haven''t found an RFE for this yet. Is this planned? Should I file an
RFE?
Or did I overlook something?


Thanks,
    Constantin

-- 
Sent from OpenSolaris, http://www.opensolaris.org/

Constantin Gonzalez                              Sun Microsystems GmbH, Germany
Principal Field Technologist                    http://blogs.sun.com/constantin
Tel.: +49 89/4 60 08-25 91       http://google.com/search?q=constantin+gonzalez

Sitz d. Ges.: Sun Microsystems GmbH, Sonnenallee 1, 85551 Kirchheim-Heimstetten
Amtsgericht Muenchen: HRB 161028
Geschaeftsfuehrer: Thomas Schroeder, Wolfgang Engels, Wolf Frenkel
Vorsitzender des Aufsichtsrates: Martin Haering

Constantin Gonzalez wrote:
> Imagine a system that needs to handle thousands of users. Setting quota
> individually for all of these users would quickly become unwieldly, in a 
> similar
> manner to the unwieldliness that having a filesystem for each user 
> presented.
The main reason for not having a fileystem per user was really the 
client side impact because NFSv4 and mirror mounts aren''t available in 
enough places or there are other limitations on NFS clients (like the 
VMware 16 mounts limitation).
> Which was the reason to introduce user/group quotas in the first place.
> 
> IMHO, it would be useful to have something like:
> 
>   zfs set userquota=5G tank/home
> 
> and that would mean that all users who don''t have an individual
user quota
> assigned to them would see a default 5G quota.
> 
> I haven''t found an RFE for this yet. Is this planned? Should I
file an RFE?
> Or did I overlook something?
I think that would be great feature.

-- 
Darren J Moffat

Hi,
>> IMHO, it would be useful to have something like:
>>
>>   zfs set userquota=5G tank/home
...
> I think that would be great feature.
thanks. I just created CR 6902902 to track this. I hope it becomes viewable
soon here:

   http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6902902

Cheers,
   Constantin

-- 
Sent from OpenSolaris, http://www.opensolaris.org/

Constantin Gonzalez                              Sun Microsystems GmbH, Germany
Principal Field Technologist                    http://blogs.sun.com/constantin
Tel.: +49 89/4 60 08-25 91       http://google.com/search?q=constantin+gonzalez

Sitz d. Ges.: Sun Microsystems GmbH, Sonnenallee 1, 85551 Kirchheim-Heimstetten
Amtsgericht Muenchen: HRB 161028
Geschaeftsfuehrer: Thomas Schroeder, Wolfgang Engels, Wolf Frenkel
Vorsitzender des Aufsichtsrates: Martin Haering