Monitoring CPM disk utilization
Issue/Introduction:
This article documents several methods for monitoring disk utilization on CPMs.There are several methods for monitoring CPM disk utilization. This article shows examples of how to check disk usage either from Crossbeam CLI, from the Linux shell, or from GEM (Greenlight Element Manager). Another option is to monitor disk usage via SNMP.
Resolution:
Checking disk usage from the Crossbeam CLI
The command show disk-usage can be used to display disk utilization on the CPM:
CBS# show disk-usage
======================================================================
Top Disk Users Report for Thu Aug 23 05:16:55 EDT 2012
======================================================================
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda7 11812024 11810152 0 100% /
/dev/sda1 102740 7984 89540 9% /boot
/dev/drbd0 1971472 131720 1739608 8% /cbconfig
/dev/drbd1 37353008 26427676 9027860 75% /tftpboot
/dev/drbd2 2011792 37796 1871804 2% /mgmt
On XOS version 9.6.0 or higher, a new command, show statistics is implemented. The following example shows disk utilization for the first CPM:
This command can also be used to display utilization of local APM hard drives when changing the source parameter. Another option is to use the verbose parameter to change the output format.
On XOS version 9.6.0 or higher, a new command, show statistics is implemented. The following example shows disk utilization for the first CPM:
CBS# show statistics table disk-utilization source cp1
--------------------------------------------------------------------------------
File
Slot Module Vap System Mount Type Size Free Used %
==== ====== === ========== ========= ==== ==== ==== ==== ====
13 cp1 - /dev/sda7 / ext3 12G 0 12G 100%
13 cp1 - /dev/sda1 /boot ext3 101M 88M 7.8M 9%
13 cp1 - /dev/drbd0 /cbconfig ext3 1.9G 1.7G 129M 8%
13 cp1 - /dev/drbd1 /tftpboot ext3 36G 8.7G 26G 75%
13 cp1 - /dev/drbd2 /mgmt ext3 2.0G 1.8G 37M 2%
--------------------------------------------------------------------------------
Checking disk usage from the Linux shell
The standard UNIX df command prints utilization of mounted filesystems. When executed with the -h parameter, the sizes in the output are in human-readable format (e.g., 1K, 234M, or 2G).
[[email protected] admin]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda7 12G 12G 0 100% /
/dev/sda1 101M 7.8M 88M 9% /boot
none 1.8G 0 1.8G 0% /dev/shm
/dev/drbd0 1.9G 129M 1.7G 8% /cbconfig
/dev/drbd1 36G 26G 8.7G 75% /tftpboot
/dev/drbd2 2.0G 37M 1.8G 2% /mgmt
...
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Another way to check disk utilization from the Linux shell is the /crossbeam/bin/cbs_disk_usage command. Output from this command is similar to the output of the show disk-usage CLI command. Additionally, it prints the largest files on the filesystem.
Checking disk usage from GEM
From GEM, disk utilization can be observed in the CPMs view.
Checking disk usage from GEM
From GEM, disk utilization can be observed in the CPMs view.