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Set Disk Quota
2011/07/12 |
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Limit amount of disk usage to set Disk Quota.
For example on here, Set Quota on /home which is ext4 formatted.
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| [1] | Install Quota tools. |
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[root@dlp ~]# yum -y install quota
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| [2] | Enable Quota to add mount options. |
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[root@dlp ~]#
vi /etc/fstab # add options
/dev/mapper/VolGroup-lv_root / ext4 defaults 1 1
UUID=cf3f9660-e40d-459d-8763 /boot ext4 defaults 1 2
/dev/mapper/VolGroup-lv_swap swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
/dev/sdb1 /home xfs defaults,usrquota,grpquota 0 0
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| [3] | Set user Quota. For example, Apply quota to "cent" user. |
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# show status [root@dlp ~]# quotaon -ap group quota on /home (/dev/sdb1) is off user quota on /home (/dev/sdb1) is on # set Soft Limit 4G, Hard Limit 5G (specify with kilo bytes) Disk quotas for user cent (uid 500): Filesystem blocks soft hard inodes soft hard /dev/sdb1 16 4096000 5120000 7 0 0 # show status [root@dlp ~]# repquota -au
*** Report for user quotas on device /dev/sdb1
Block grace time: 7days; Inode grace time: 7days
Block limits File limits
User used soft hard grace used soft hard grace
----------------------------------------------------------------------
root -- 20 0 0 2 0 0
cent -- 16 4096000 5120000 4 0 0
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| [4] | If you'd like to apply setting of quota of a user to another user, set like follows. |
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# apply setting of "cent" to "fedora" [root@dlp ~]# edquota -p cent fedora [root@dlp ~]# repquota -au
*** Report for user quotas on device /dev/sdb1
Block grace time: 7days; Inode grace time: 7days
Block limits File limits
User used soft hard grace used soft hard grace
----------------------------------------------------------------------
root -- 20 0 0 2 0 0
cent +- 5120000 4096000 5120000 6days 7 0 0
fedora -- 4 4096000 5120000 4 0 0
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| [5] | Set group Quota. For example, Apply quota to "cent" group. |
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# show status [root@dlp ~]# quotaon -ap group quota on /home (/dev/sdb1) is on user quota on /home (/dev/sdb1) is on # set Soft Limit 4G, Hard Limit 5G (specify with kilo bytes)
Disk quotas for group cent (gid 500):
Filesystem blocks soft hard inodes soft hard
/dev/sdb1 5120000 4096000 5120000 7 0 0
# show status [root@dlp ~]# repquota -ag
*** Report for group quotas on device /dev/sdb1
Block grace time: 7days; Inode grace time: 7days
Block limits File limits
Group used soft hard grace used soft hard grace
----------------------------------------------------------------------
root -- 20 0 0 2 0 0
cent +- 5120000 4096000 5120000 6days 7 0 0
fedora -- 16 0 0 4 0 0
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| [6] | It's possible to send warnings to use Warnquota. This setting needs SMTP server on your server. |
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[root@dlp ~]#
vi /etc/quotatab # add device and description which quota is set
/dev/sdb1: Your Home Director
# change domain name to your own one [root@dlp ~]# sed -i -e "s/example\.com/server\.world/g" /etc/warnquota.conf
# run warnquota [root@dlp ~]# warnquota -s
# if a user is over the limit when warnquota runs, following warning is sent
From root@dlp.srv.world Fri Oct 23 09:38:10 2011
Return-Path: <root@dlp.srv.world>
X-Original-To: cent
Delivered-To: cent@dlp.srv.world
From: root@srv.world
Reply-To: root@srv.world
Subject: NOTE: You are exceeding your allocated disk space limits
To: cent@dlp.srv.world
Cc: root@srv.world
Date: Fri, 23 Oct 2011 09:38:10 +0900 (JST)
Status: R
Your disk usage has exceeded the agreed limits on this server
Please delete any unnecessary files on following filesystems:
Your Home Director (/dev/sdb1)
Block limits File limits
Filesystem used soft hard grace used soft hard grace
/dev/sdb1 +- 5000M 4000M 5000M 6days 7 0 0
root@srv.world
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