01-24-2008
If your system is running AIX 5.2 or 5.3, I would suggest using the AIX Remote Monitoring and Control (RMC) facility. Run the following command to see if the required fileset is installed:
lslpp -l rsct.core.errm
If it is installed, then you can let the AIX kernel monitor the filesystem space used. The operating system can be configured to send alerts both when the space used goes above a specified level and also when it drops below a specified level.
The following command creates a monitoring condition called "Filesystem space 2" to monitor the filesystems /u01 and /u02. An event will be generated when the space used goes above 85% and a rearm event will be generated when it falls below 80% (the following all goes on one line):
mkcondition -r "IBM.FileSystem" -e "PercentTotUsed > 85"
-E "PercentTotUsed < 80" -d "An event will be generated when more than 85 percent of the total space of the filesystem is in use." -D "The event will be rearmed when the percent of the space used in the filesystem falls below 80 percent." -s "Name == \"/u01\" || Name == \"/u02\"" -S i -m l "Filesystem space 2"
The following command creates a response called "E-mail app support" which is in effect seven days a week, 24 hours a day. It will send an e-mail to an alias "appmail" which is defined within /etc/aliases:
mkresponse -n "E-mail app support" -d "1-7" -t "0000-2400" -s "/usr/sbin/rsct/bin/notifyevent appmail" -r "-1" -e "b" "E-mail app support"
(Again, the above command would be typed all on one line)
Finally, you tie the response to the condition and start the monitoring:
startcondresp "Filesystem space 2" "E-mail app support"
Some of the commands that are available:
lscondition: lists existing conditions and their status (enabled/disabled)
lscondition "Filesystem space 2" (the quotes are required): lists the details about condition "Filesystem space 2"
lscondresp: lists existing responses
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df(1) General Commands Manual df(1)
Name
df - display free and used disk space
Syntax
df [-i] [-l] [-n] [filesystem...] [file...]
Description
The command displays the amount of disk space available on the specified file system, for example, It also displays the amount of available
disk space on the file system in which the specified file is contained, for example, If a device is given that has no file systems mounted
on it, displays the information for the root file system. Without any arguments or options, displays shows all mounted filesystems,
including those manually mounted without use of the file. The numbers are reported in kilobytes.
Unless the -n option is specified, updates the statistics stored in memory for the file system specified, before it returns the informa-
tion.
Options
-i Also report the number of used and free inodes.
-l Reports on locally mounted disks only.
-n Do not update the file system statistics stored in memory. Instead, return whatever statistics are stored in memory. This prevents
from hanging in the event that a server containing the specified file system is down.
Restrictions
You cannot use the command to find free space on an unmounted file system using the block or character special device name. Instead, use
the command.
Examples
% df
Filesystem Total kbytes kbytes %
node kbytes used free used Mounted on
/dev/ra1a 7429 2085 4602 31% /tmp
/dev/ra0e 30519 14817 12651 54% /usr/spool
/dev/ra0h 313233 122858 159052 44% /usr/staff1
The total disk space is the total space that was created during the making of the file system. The addition of the used space, the free
space and a percentage of reserved space is the total space. The default value for the reserved space is 10%.
Files
List of mounted file systems
See Also
getmnt(2), fstab(5), dumpfs(8), icheck(8), mkfs(8), newfs(8), quot(8)
df(1)