User fail on disk quota when creating a file? : linux, bypass, disk, quota

May 17, 2008 07:02am pdt

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03.24.2002 at 04:30AM PST, ID: 20280861

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6.8

User fail on disk quota when creating a file?

Zones: Linux, Red Hat Linux

Tags: linux, bypass, disk, quota

User fail on disk quota when creating a file,
Although this user have a lot of free quota

mysql user and group got lot of free disk space :
>/sbin/quotaoff /dev/hda4
>quota -v mysql
Disk quotas for user mysql (uid 116):
Filesystem blocks quota limit grace files quota limit grace
/dev/hda4 88415 1000000 2000000 87 1000 2000

>quota -g mysql
Disk quotas for group mysql (gid 116):
Filesystem blocks quota limit grace files quota limit grace
/dev/hda4 4 512001 512000 6 1000 2000

Only quotaoff
>/sbin/quotaoff /dev/hda4
bypass this problem !

The linux Kernel is 2.2.14

Any idea ?

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Question Stats

Zone: OS

Question Asked By: addady

Solution Provided By: jlevie

Participating Experts: 2

Solution Grade: C

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03.24.2002 at 09:44AM PST, ID: 6892354

Rank: Sage

jlevie:

When you see the quota problem is mysql the logged on user, or is the logged on user someone else that's using the database?

03.24.2002 at 11:43AM PST, ID: 6892455

addady:

I'm login as root and then "su mysql",
so you can say I'm logon as user.
The point is the mysql database process fail for the
same resion.

03.24.2002 at 12:55PM PST, ID: 6892525

Rank: Sage

jlevie:

Do you get the same failure if you log on as the mysql user? Are quota's in effect for any other file systems?

I've heard of this problem before with MySQL but since I use Postgres rather than MySQL I've never encountered it myself. I don't know if it's actually a quota problem or a problem with MySQL in how it manipulates its data storage. My guess, right now, is that it's a problem with MySQL.

03.29.2002 at 12:57AM PST, ID: 6904660

addady:

>Do you get the same failure if you log on as the mysql >user?

Yes

>Are quota's in effect for any other file
>systems?

No

03.29.2002 at 10:00AM PST, ID: 6905397

Rank: Sage

jlevie:

What Linux is this? Can I see the output of 'df -k'? And I'd like to know where the home dir of the mysql user is.

I've been assuming, from the way the question is phrased, that the problem occurs when MySQL is trying to create or mannipulate databases. Can the mysql user create a simple file, perhaps like:

mysql> cd
mysql> cp /etc/hosts .

03.29.2002 at 12:25PM PST, ID: 6905663

addady:

>What Linux is this?
red hat 6.0 Kernel is 2.2.14 on cobalt raq4.

>I've been assuming, from the way the question is phrased,
>that the problem occurs when MySQL is trying
>to create or mannipulate databases

You are rigth, that how is start. But It happen allso when
I login as mysql user and try to create a file

>Can I see the output of 'df -k'
now the quota is off. the problem is on /home
$ df -k
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/hda1 743466 628597 114869 85% /
/dev/hda3 198601 24611 173990 12% /var
/dev/hda4 17671528 4276710 13394818 24% /home

04.03.2002 at 06:45PM PST, ID: 6916983

Rank: Sage

jlevie:

Well, since it quotas apparently worked a for a time and then started failing I'd say it's probably a software fault in the quota system. Especially since the failure occurs for the user when creating ordinary files. Ordinarily I'd suggest updating the system, but on a Cobalt you'd need to get those updates from the vendor and that service may only be available with a service contract.

Do you really need quotas enabled? The obvious work around would be to just disable quotas and manually monitor disk space for abuse.

04.03.2002 at 10:52PM PST, ID: 6917379

addady:

>Do you really need quotas enabled? The obvious work >around would be to just disable quotas and manually
>monitor disk space for abuse.

That what I'm doing now, but I realy need it.
Do you know any ext2 util that can repare the quota ?

04.04.2002 at 11:23AM PST, ID: 6918968

Rank: Sage

jlevie:

You can try using quotacheck to update quotas and repair any problems with the quota's files. Before doing that you really need to read the man page for quotacheck, and especially take note of what it says about only using that tool on an unmounted filesystem.

The best way to attempt a repair of the quota system is to boot single user. I don't think /home will be mounted at that point (check with df to be sure) and then run:

# quotacheck -u
# quotacheck -g

If booting to single user mode isn't an option you can try logging in as root and unmounting /home. This would have to be done with no other users logged on. Also if there are any processes running, like MySQL, that use or were started from /home you won't be able to unmount /home as long as those processes exist. If you can get /home unmounted, run quotacheck as above.

Accepted Solution

rssdds

04.06.2008 at 07:08AM PDT, ID: 21291790

Isn't there a decent way to turn off quotas without having to reboot?

jlevie

04.06.2008 at 12:45PM PDT, ID: 21292904

See 'man quotaoff'

The quota system can be turned on/off without a reboot. In the comment above, booting into single user mode was necessary to be able to rebuild the quota system with that file system unmounted.

rssdds

04.06.2008 at 03:04PM PDT, ID: 21293310

So what command actually sets the command? I was able to reset the quota for a folder I think thourgh the RAQ3 admin module. Can you please comment on what it may have done?
There must be a quota adjust command and this seemed to affect a certain set of folders. it was rather strange it worked like this. I was expecting quotaoff to run as root and shut off all the quota services and thus not have any quota errors there after but the system appears not to let you do this. What will happen when I reboot most likely? Will the quota system stop working if II ran quotaoff? or will it probably just turn it back on. This is a Cobalt Raq3 server I am talking about.

jlevie

04.06.2008 at 04:37PM PDT, ID: 21293579

I don't know what the "reset quota" action the RAQ admin module does. It might be using quotacheck or edquota in some way.

To completely disable quotas, use quotaoff to disable checking an enforcing of quotas, and then remove the quota files from the root of the file system. On the next reboot quotas on the filesystem will not start. See the man pages for quota, quotaon, edquota, etc for more information.

20080206-EE-VQP-25