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Available space after enable quota in XFS

To: xfs@xxxxxxxxxxx
Subject: Available space after enable quota in XFS
From: "geturmaddy@xxxxxxxxx" <geturmaddy@xxxxxxxxx>
Date: Tue, 20 Nov 2012 12:16:32 +0530
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Hi all,
I am trying to evaluation XFS for NFS server. We need to configure directory level quota in order to better manage storage in the server. I came to know that, we can use project quota which looks similar to directory level quotas. 

I was able to configure project level quota for XFS file system in my Cent)S 5.7 machine. Below are the details

[root@linux-nfs ~]# cat  /etc/issue
CentOS release 5.6 (Final)
Kernel \r on an \m

[root@linux-nfs ~]# cat /etc/projects 
13:/das/myproject1

[root@linux-nfs ~]# cat /etc/projid 
myproject1:13

[root@linux-nfs ~]# xfs_quota -xc 'report -p' /das
Project quota on /das (/dev/cciss/c0d0)
                               Blocks                     
Project ID       Used       Soft       Hard    Warn/Grace     
---------- -------------------------------------------------- 
myproject1          0          0     102400     00 [--------]

You can see the hard limit set to 1G. But, when i check directory space using df -h command. its showing entire file system space in "Avail" column.

[root@linux-nfs ~]# df -h /das/myproject1/
Filesystem            Size  Used Avail Use% Mounted on
/dev/cciss/c0d0       100M     0   13T   0% /das

Is there a way we can restrict showing entire FS size in Avail column (or show available space which is left after using the allocated quota i.e, Avail space = Size - Used) ? This actually cause confusion to end user who things they still have enough space in the directory. 

Thanks in advance
__madhusudhan
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