Filesystem monitoring

4 minute read

Posted 2021-06-26 - Updated 2021-07-05
Supported on Linux, Aix, MacOS

Filesystem monitoring (Line beginning with ‘FS’)

SysMon automatically detect new filesystem on the system and add them to the SysMon configuration file and can check a filesystem usage and . By default,it will set the “Warning” usage level to 85% and the “Error” at 90%. If the file system usage is greater or equal to 85% and less than 90% it will shows up in the System Monitor web page as a “Warning”. If the usage is equal or greater than 90%, it will appear an an “Error” is the System Monitor web page and an alert is generated. In the example below, I have change the warning threshold from 85% to 80% in the fourth column to raise a warning.

Every time Sysmon is run the system SysMon configuration file is loaded in memory, updated in memory during execution and then unloaded to disk when terminated. So SysMon is able to know when a new filesystem is created on the system and it is added automatically to his configuration file. The warning threshold is set to 80% and the error to 90%. These are initial value, you can change them and they will remain to your setting.

# COLUMN 1    2  3   4   5   6  7    8   9 A B C D E F G     H     I      J        K   L
FS/wsadmin   82 >=  80  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -

If a line in the SysMon configuration file begin with “FS”, this indicate that this line is used to test the filesystem usage. In the example above we are evaluating the “/wsadmin” filesystem usage. It is currently using 82% and we’ve set the warning level at 80% and the error level at 90%. Since we are above the warning level (and below the error level), this have trigger an warning alert.

Sysmon Warning on Web

The warning will always appear on the system monitor web page, like the example below.

Sysmon Warning on Web

# ----- Filesystem Monitoring
# Can increase it by 10%, two times within 24hours maximum, if script 
# "sadm_fs_incr.sh" in Column L.
# FS/usr 23 >= 25 90 001 0000 0000 Y Y Y Y Y Y Y Y 20180615 0824 wargrp errgrp sadm_fs_incr.sh
#----------------------------------------------------------------------------------------
# ID COLUMN 1  2  3   4   5  6   7    8   9 A B C D E F G     H     I     J       K     L
#----------------------------------------------------------------------------------------
#
#SADMSTAT 2.5 holmes - Sat Feb  4 09:56:10 2017 - Execution Time 5.00 seconds
FS/           39 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/usr        72 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/boot       53 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/wiki        5 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/wsadmin    82 >=  80  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/backups    64 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/psadmin     4 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/storix     12 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/opt        71 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/tmp         1 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/sysadmin    9 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/linternux   4 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/var        27 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/sadmin     38 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/home       55 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/install     6 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/gitrepos   10 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
FS/history     1 >=  85  90 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 default default -
#SYSMON 2.43 holmes - Last Boot: 2021-05-28 07:16:27 - Mon Jun 14 11:07:04 2021 - Execution Time 2.00 seconds

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See also

Link to … Description
sadm_sysmon_tui.pl Command line summary of alerts and failed scripts of all your servers.
sadm_sysmon.pl Client system monitor
sadm_fetch_clients.sh rsync all .rch/.log/.rpt from actives clients to the SADMIN server
SysMon configuration file Client System Monitor configuration file
sadmin.cfg SADMIN main configuration file

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