Difference between revisions of "XFS"

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Let's say we want to limit /vserver/foo to 5G of space.
 
Let's say we want to limit /vserver/foo to 5G of space.
  
1. Edit /etc/fstab, and put prjquota as an option for /vserver, and reboot. (I don't think -o remount works)
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Edit /etc/fstab, and put prjquota as an option for /vserver, and reboot. (I don't think -o remount works). It should look like this:
2. echo "1235:/vservers/foo" >> /etc/projects (I use the context for the project ID number)
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<pre># grep prjquota /etc/fstab
3. echo "foo:1235" >> /etc/projid (This is just so you can refer to a project by name)
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/dev/cciss/c0d0p7      /vserver          xfs    noatime,prjquota        0 0
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</pre>
 +
 
 +
Warning: XFS: cannot mount with both project and group quota
 +
 
 +
<pre>echo "1235:/vservers/foo" >> /etc/projects</pre>(I use the context for the project ID number)
 +
<pre>echo "foo:1235" >> /etc/projid</pre>(This is just so you can refer to a project by name)
  
 
Now we just set up the quota....
 
Now we just set up the quota....
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<pre>xfs_quota -x -c 'project -s foo' /vserver</pre>
 
<pre>xfs_quota -x -c 'project -s foo' /vserver</pre>
  
And set our limits on it.
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And set our limits on it. (bhard = blocks hard, bsoft = blocks soft)
  
<pre>xfs_quota -x -c 'limit -p bhard=5G foo' /vserver</pre>
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<pre>xfs_quota -x -c 'limit -p bsoft=4800M bhard=5G foo' /vserver</pre>
  
 
Voila. Vservers with XFS.
 
Voila. Vservers with XFS.
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You can check the usage, etc with:
 
You can check the usage, etc with:
  
<pre>
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<pre># xfs_quota -x -c 'report' /vserver
# xfs_quota -x -c 'report' /home
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Project quota on /vserver (/dev/cciss/c0d0p7)
Project quota on /home (/dev/cciss/c0d0p7)
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                               Blocks
 
                               Blocks
 
Project ID      Used      Soft      Hard    Warn/Grace
 
Project ID      Used      Soft      Hard    Warn/Grace
 
---------- --------------------------------------------------
 
---------- --------------------------------------------------
foo           3002840         0   5242880   00 [--------]
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foo          10002856    4915200   5242880     00 [--none--]
 
....
 
....
 
</pre>
 
</pre>
  
It does work, but df -h doesn't show the limit in the vserver. I'm not sure how users are meant to see how close they are to the limit. I shall investigate, and if I work it out, come back here.
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It does work, but df -h doesn't show the limit properly in the vserver.
 +
It does show the size, and the used, but the avail it still takes from the
 +
<pre># df -h
 +
Filesystem            Size  Used Avail Use% Mounted on
 +
/dev/hdv1            5.0G  3.0G  17G  21% /
 +
</pre>
 +
 
 +
[[Category:Documentation]]

Latest revision as of 21:03, 21 October 2011

So, you use the lovely XFS file system, but those meanies at linux-vserver have told you it's not supported. :) No problems.

To get the same sort of effect as dlimits, while using the XFS file system, you can use Project Quotas.

Let's say we want to limit /vserver/foo to 5G of space.

Edit /etc/fstab, and put prjquota as an option for /vserver, and reboot. (I don't think -o remount works). It should look like this:

# grep prjquota /etc/fstab
/dev/cciss/c0d0p7       /vserver           xfs     noatime,prjquota        0 0

Warning: XFS: cannot mount with both project and group quota

echo "1235:/vservers/foo" >> /etc/projects
(I use the context for the project ID number)
echo "foo:1235" >> /etc/projid
(This is just so you can refer to a project by name)

Now we just set up the quota....

xfs_quota -x -c 'project -s foo' /vserver

And set our limits on it. (bhard = blocks hard, bsoft = blocks soft)

xfs_quota -x -c 'limit -p bsoft=4800M bhard=5G foo' /vserver

Voila. Vservers with XFS.

You can check the usage, etc with:

# xfs_quota -x -c 'report' /vserver
Project quota on /vserver (/dev/cciss/c0d0p7)
                               Blocks
Project ID       Used       Soft       Hard    Warn/Grace
---------- --------------------------------------------------
foo          10002856    4915200    5242880     00 [--none--]
....

It does work, but df -h doesn't show the limit properly in the vserver. It does show the size, and the used, but the avail it still takes from the

# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/hdv1             5.0G  3.0G   17G  21% /
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