ZFS does not release space even after deleting apache log files in a non-global zone

Nue-b · 03-25-2014, 09:58 AM

Hi Guys,

I have a non-global zone in which has apache application on it. There is a ZFS filesystem where the app saves the log. Even after deleting the logfiles I dont see the space being freed up. There are no snapshots or anything at all

Zpool info
NAME SIZE ALLOC FREE CAP HEALTH ALTROOT
adpl203 9.94G 9.75G 190M 98% ONLINE -

ZFS info
NAME USED AVAIL REFER MOUNTPOINT
adpl203 9.75G 31.4M 31K /adpl203
adpl203/data 9.75G 31.4M 31K /adpl203/data
adpl203/data/ajb_home 9.75G 31.4M 9.75G /export/home/ajb

zfs list -o space
NAME AVAIL USED USEDSNAP USEDDS USEDREFRESERV USEDCHILD
adpl203 29.7M 9.75G 0 31K 0 9.75G
adpl203/data 29.7M 9.75G 0 31K 0 9.75G
adpl203/data/ajb_home 29.7M 9.75G 0 9.75G 0 0

df -h

adpl203/data 9.8G 31K 31M 1% /adpl203/data
adpl203/data/ajb_home 9.8G 9.8G 31M 100% /export/home/ajb

Can you please help me find a solution!

jlliagre · 03-25-2014, 11:19 AM

Please use code tags.

The log files are likely still open by apache, thus even unlinked, their data is still stored on the file system. This would happen with other file systems than ZFS. You should have blanked their content before removing them, as with:

Code:

> apache.log
rm apache.log

Nue-b · 03-25-2014, 02:06 PM

After bouncing Apache the issue got cleared. Thanks for the input.