Deleted some files to "clean up" /var/log, but the space was not recovered?

Space for deleted files are only recovered when all references to that space 
are removed.   This includes the directory reference, and any open file-handles 
to the file.

The is a popular trick for a self-deleting scratch file.  Create a file, open 
file-handle to it, and then remove the file.   The open file-handle can then be 
written to, and read from, as long as you like, but when the file-handle is 
closed, explicitly or implicitly, the space is automatically recovered.


-----Original Message-----
From: Andrei Verovski <andre...@starlett.lv> 
Sent: Wednesday, June 22, 2022 3:27 PM
To: users@ovirt.org
Subject: [ovirt-users] Lost space in /var/log

Hi !

I have strange situation with low disk space on /var/log/, yet I can't figure 
out what have consumed so much space.
Look at the du output.

Thanks in advance for any suggestion(s).


# df -h

Filesystem                       Size  Used Avail Use% Mounted on
/dev/mapper/centos-var           15G  1.3G   13G   9% /var
/dev/mapper/centos-var_log       7.8G  7.1G  293M  97% /var/log
/dev/mapper/centos-var_log_audit 2.0G   41M  1.8G   3% /var/log/audit

#
# du -ah /var/log | sort -n -r | head -n 20

664K    /var/log/vdsm
660K    /var/log/vdsm/vdsm.log
624K    /var/log/gdm
580K    /var/log/anaconda/storage.log
480K    /var/log/anaconda/packaging.log
380K    /var/log/gdm/:0.log.4
316K    /var/log/anaconda/syslog
276K    /var/log/tuned
252K    /var/log/libvirt/qemu/NextCloud-Collabora-LVM.log-20210806
220K    /var/log/Xorg.0.log
168K    /var/log/gdm/:0.log
156K    /var/log/yum.log-20191117
156K    /var/log/secure-20180726
132K    /var/log/libvirt/qemu/NextCloud-Collabora-Active.log
128K    /var/log/anaconda/anaconda.log
120K    /var/log/hp-snmp-agents
116K    /var/log/hp-snmp-agents/cma.log
112K    /var/log/vinchin
104K    /var/log/vinchin/kvm_backup_service
104K    /var/log/tuned/tuned.log.2

#
# find . -printf '%s %p\n'| sort -nr | head -10

16311686 ./rhsm/rhsm.log
4070423 ./cron-20180726
3667146 ./anaconda/journal.log
3409071 ./secure
3066660 ./rhsm/rhsm.log-20180726
2912670 ./audit/audit.log
1418007 ./sanlock.log
1189580 ./vdsm/vdsm.log
592718 ./anaconda/storage.log
487567 ./anaconda/packaging.log
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