OK, let’s compare the two snapshots, one taken today, the other taken on Monday.
[dan@ngaio:/usr] $ sudo du -c -d 1 . Password: 4 ./.snap 62760 ./bin 37520 ./include 93068 ./lib 184 ./libdata 35384 ./libexec 75109696 ./local 37708 ./sbin 102480 ./share 1103840 ./src 250268 ./compat 376 ./games 4 ./obj 71082728 ./home 3584112 ./ports 4 ./tmp 18287800 ./websites 4 ./bacula-restores 1335104 ./FreshPorts 21599028 ./samba_mounts 58065982 ./jails 250788058 . 250788058 total [dan@ngaio:/usr] $ |
[dan@ngaio:/usr] $ sudo do du -c -d 1 . Password: 4 ./.snap 62760 ./bin 37520 ./include 93068 ./lib 184 ./libdata 35384 ./libexec 75122352 ./local 37708 ./sbin 102480 ./share 1103840 ./src 250268 ./compat 376 ./games 4 ./obj 69616808 ./home 3584112 ./ports 4 ./tmp 18296420 ./websites 4 ./bacula-restores 1335104 ./FreshPorts 21598740 ./samba_mounts 59385950 ./jails 250663094 . 250663094 total [dan@ngaio:/usr] $ |
The main differences are:
- local: went from 75109696 to 75122352 (an increase of not much at all)
- home: from 71082728 to 69616808 (a decrease of 1465920, but not much)
- websites: from 18287800 to 18296420 (a change of 8620, nothing there)
- samba_mounts: from 21599028 to (288, nothing!)
- jails: from 58065982 to 59385950 (1319968… now we’re talking!)
Now I think I know what was happening. There is only one jail on this system and it runs a Bacula installation which I use for testing. I left it running. So it was running daily backups. Let’s go see how much disk space is being used by that.
[dan@ngaio:/usr/jails/ducky.unixathome.org/tmp] $ ls -lh total 23019758 -rw-r----- 1 bacula wheel 219B Jul 27 17:51 Test001 -rw-r----- 1 bacula wheel 221B Jul 27 18:04 Test3000 -rw-r----- 1 bacula wheel 221B Jul 27 18:05 Test3001 -rw-r----- 1 bacula wheel 22G Oct 1 23:14 Test3003 drwxr-x--x 3 root wheel 512B Aug 14 2010 bacula-restores srwxrwxrwx 1 mysql wheel 0B Mar 3 2011 mysql.sock -rw------- 1 root wheel 6B Sep 16 2010 portlicenses.rTIDwH1a drwxr-xr-x 4 root wheel 512B Mar 3 2012 screens drwx------ 2 dan wheel 512B Nov 20 2009 ssh-xP95yfWAyW [dan@ngaio:/usr/jails/ducky.unixathome.org/tmp] $
Ouch, I see a 22G file there. We don’t need that.
Dealing with that file appropriately with respect to Bacula is outside the scope of this post. But you purge the volume, then let it get recycled and it frees up the space when that volume is next used in a backup job. NOTE: Volume in this context refers to the file Test3003.
If I hadn’t realized right away that my rogue Bacula testing was responsible, I would have repeated my du on /usr/jails/ a couple of days apart to see what was eating up the disk space.
Now my free disk space looks much better:
$ df -h /usr Filesystem Size Used Avail Capacity Mounted on /dev/twed0s1g 138G 96G 31G 76% /usr
