Enforcing quota for root user

[Chris Murphy]

On Nov 11, 2014, at 8:36 AM, Stan Hoeppner <stan at hardwarefreak.com> wrote:

> On 11/11/2014 04:22 AM, Cyril Scetbon wrote:
>> That's what I've read first, but someone showed me a sample where it works. He just told me he was using project quota. However, does it make sense ? 
>> I've also read somewhere else that quota is never enforced for root user (id,gid=0) that's why I was testing it ....
> 
> No, it doesn't make sense.  Why would you want to enforce quotas for root?

A week ago I tried this and project quotas appear to apply to root.

[root at localhost project_quota_test1]# xfs_quota -c df
Filesystem           1K-blocks       Used  Available  Use% Pathname
/dev/sdb              83845120     157980   83687140    0% /xfs_local
/dev/sdb                102400     124928 9223372036854753280  122% /xfs_local/project_quota_test1
[root at localhost project_quota_test1]# dd if=/dev/zero of=test100MB bs=1M count=100
dd: error writing ‘test100MB’: No space left on device
79+0 records in
78+0 records out
81788928 bytes (82 MB) copied, 0.163849 s, 499 MB/s
[root at localhost project_quota_test1]# xfs_quota -c df
Filesystem           1K-blocks       Used  Available  Use% Pathname
/dev/sdb              83845120     237748   83607372    0% /xfs_local
/dev/sdb                102400     204800 9223372036854673408  200% /xfs_local/project_quota_test1


The available space value seems like a bug, at least it’s not a sane/helpful value. But I do get a no space left on device, and the file being written is truncated at the hard limit for that project (directory).


Chris Murphy