It is possible to tune the following items:
Communication timeout value of the GFS Shared File System(CON_TIMEOUT)
CON_TIMEOUT set up time in seconds after a communicative response is lost until it estimates a partner node to be an abnormal state in the monitoring of the node by communication. This value can be set for every file system.
The default of a communication timeout value is 180 seconds.
It is not usually necessary to change communication timeout value.
Specify the tuning parameters with the -o option of sfcadm(8).
The following shows the setting example.
(Example)
# sfcadm -o CON_TIMEOUT=240 /dev/sfdsk/gfs01/dsk/volume01 <Enter> |
Check the specified values with the -e option of sfcinfo(8).
The following shows the example to check the values.
(Example)
# sfcinfo -e /dev/sfdsk/gfs01/dsk/volume01 | grep CON_TIMEOUT <Enter> CON_TIMEOUT=240 |
When it is expected that the loading of system becomes high, please set the value of CON_TIMEOUT greatly. Please set up the value of CON_TIMEOUT small, when there are few file systems to be used and improve the response of the error return from a system call to the time of the blockade accompanying the abnormalities in communication etc. When the number of file system use are 10 or less and set a value of CON_TIMEOUT small, its value should be 60 seconds or more.
