Difference between revisions of "XFS"

Revision as of 13:35, 3 October 2007 (view source) 82.69.161.137 (Talk) (New page: 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...)		Latest revision as of 20:03, 21 October 2011 (view source) Glenn (Talk | contribs) (+cat)
(7 intermediate revisions by 2 users not shown)
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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)	+	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)	+	<pre># grep prjquota /etc/fstab
−	3. echo "foo:1235" >> /etc/projid (This is just so you can refer to a project by name)	+	/dev/cciss/c0d0p7      /vserver          xfs    noatime,prjquota        0 0
		+	</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....
−	4. xfs_quota -x -c 'project -s foo' /vserver	+	<pre>xfs_quota -x -c 'project -s foo' /vserver</pre>
−	And set our limits on it.	+	And set our limits on it. (bhard = blocks hard, bsoft = blocks soft)
−	5. xfs_quota -x -c 'limit -p bhard=5G foo' /vserver	+	<pre>xfs_quota -x -c 'limit -p bsoft=4800M bhard=5G foo' /vserver</pre>
	Voila. Vservers with XFS.		Voila. Vservers with XFS.
Line 22:		Line 28:
	You can check the usage, etc with:		You can check the usage, etc with:
−	<pre>	+	<pre># xfs_quota -x -c 'report' /vserver
−	# xfs_quota -x -c 'report' /home	+	Project quota on /vserver (/dev/cciss/c0d0p7)
−	Project quota on /home (/dev/cciss/c0d0p7)	+
	Blocks		Blocks
	Project ID      Used      Soft      Hard    Warn/Grace		Project ID      Used      Soft      Hard    Warn/Grace
	---------- --------------------------------------------------		---------- --------------------------------------------------
−	foo           3002840         0   5242880   00 [--------]	+	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.	+	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 20:03, 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% /