Difference between revisions of "Sysadmin/Quota"
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== User quota == | == User quota == | ||
| − | The /srv filesystem has usrquota enabled with the following per-user limits: | + | The /srv filesystem on [[Machine/sunjammer]] has usrquota enabled with the following per-user limits: |
soft hard | soft hard | ||
| Line 27: | Line 27: | ||
* Q: Um, I said what I wanted was more space on my account, *please* | * Q: Um, I said what I wanted was more space on my account, *please* | ||
* A: Sure, hang on. < clickety...clickety... rm -r /home/$USER > There, you've got *plenty* of space now! | * A: Sure, hang on. < clickety...clickety... rm -r /home/$USER > There, you've got *plenty* of space now! | ||
| + | |||
| + | (from [http://www.nyms.de/bofhoriginaleng.html BOFH, Part 3]) | ||
== Additional info for sysadmins == | == Additional info for sysadmins == | ||
| Line 35: | Line 37: | ||
=== Show quota summary for all users === | === Show quota summary for all users === | ||
| − | + | repquota -vast | |
| − | repquota -vast | ||
| − | |||
=== Create quota from scratch === | === Create quota from scratch === | ||
| − | + | quotacheck -m -c /home | |
| − | quotacheck -m -c /home | + | quotacheck -m -c /mail |
| − | quotacheck -m -c /mail | + | quotaon -au |
| − | quotaon -au | ||
| − | |||
=== Reset quota limits for all users === | === Reset quota limits for all users === | ||
| − | + | cd /home | |
| − | cd /home | + | for i in *; do |
| − | for i in *; do | ||
# 25G 30G 1M 1.2M | # 25G 30G 1M 1.2M | ||
setquota -u $i 26214400 31457280 1024000 1200000 /home | setquota -u $i 26214400 31457280 1024000 1200000 /home | ||
# 1G 1.2G 1M 1.2M | # 1G 1.2G 1M 1.2M | ||
setquota -u $i 10485760 12582912 1024000 1200000 /mail | setquota -u $i 10485760 12582912 1024000 1200000 /mail | ||
| − | done | + | done |
| − | |||
=== Check quota limits in cron.daily === | === Check quota limits in cron.daily === | ||
See `/etc/warnquota.conf` and `/etc/quotatab` | See `/etc/warnquota.conf` and `/etc/quotatab` | ||
| − | + | warnquota -u -s | |
| − | warnquota -u -s | ||
| − | |||
=== Crash recovery === | === Crash recovery === | ||
Latest revision as of 14:52, 14 June 2011
User quota
The /srv filesystem on Machine/sunjammer has usrquota enabled with the following per-user limits:
soft hard /srv space: 10G 12G /srv files: 1M 1.2M
When users attempt to write beyond their hard-limit, the system call fails with a "Quota exceeded" error.
If the soft-limit is exceeded, a cronjob sends a daily notification email to the user and to systems-logs@. This continues for a grace period of 7 days. Aftet the grace period, offending users will be barred from allocating any additional space until they free up some space.
Requesting limit exensions
Additional space can be requested to the sysadmins, along with a motivation. For best service, follow the canonical BOFH space extension script:
- Q: I need more space
- A: Well, why not move to Texas?
- Q: No, on my account, stupid.
- A: I didn't quite catch that. What was it that you said?
- Q: Um, I said what I wanted was more space on my account, *please*
- A: Sure, hang on. < clickety...clickety... rm -r /home/$USER > There, you've got *plenty* of space now!
(from BOFH, Part 3)
Additional info for sysadmins
Essential documentation
man edquota man setquota
Show quota summary for all users
repquota -vast
Create quota from scratch
quotacheck -m -c /home quotacheck -m -c /mail quotaon -au
Reset quota limits for all users
cd /home
for i in *; do
# 25G 30G 1M 1.2M
setquota -u $i 26214400 31457280 1024000 1200000 /home
# 1G 1.2G 1M 1.2M
setquota -u $i 10485760 12582912 1024000 1200000 /mail
done
Check quota limits in cron.daily
See `/etc/warnquota.conf` and `/etc/quotatab`
warnquota -u -s
Crash recovery
In case of crash, theoretically one should run quotacheck to scan the entire filesystem, recomputing the exact quota status of all users. In practice, nothing bad happens if the values are off by a few megabytes, so quotacheck is mostly just a waste of time.