About VXFEN tunable parameters
On each node, edit the file /etc/sysconfig/vxfen to change the value of the vxfen driver tunable global parameter, vxfen_max_delay and vxfen_min_delay. You must restart the system to put change into effect.
VXFEN tunable parameters describes tunable parameters for the VXFEN driver.
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vxfen Parameter
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Description and Values: Default, Minimum, and Maximum
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dbg_log_size
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Size of debug log in bytes
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Values
Default: 65536
Minimum: 65536
Maximum: 256K
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vxfen_max_delay and vxfen_min_delay
(See below.)
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In the event of a network partition, the smaller sub-cluster delays before racing for the coordinator disks. The time delayed allows a larger sub-cluster to win the race for the coordinator disks. The vxfen_max_delay and vxfen_min_delay parameters define the delay in seconds.
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vxfen_max_delay
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Specifies the maximum number of seconds that the smaller sub-cluster waits before racing with larger clusters for control of the coordinator disks.
This value must be greater than the vxfen_min_delay value.
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Values
Default: 60
Minimum: 0
Maximum: 600
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vxfen_min_delay
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Specifies the minimum number of seconds that the smaller sub-cluster waits before racing with larger sub-clusters for control of the coordinator disks. This value must be smaller than the vxfen_max_delay value.
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Values
Default: 1
Minimum: 0
Maximum: 600
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vxfen_vxfnd_tmt
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Specifies the time in seconds that the I/O fencing driver VxFEN waits for the I/O fencing daemon VXFEND to return after completing a given task.
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Values
Default: 60
Minimum: 10
Maximum: 600
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See Configuring the VXFEN parameters
Configuring the VXFEN parameters
For the parameter changes to take effect, reconfigure the VXFEN module.
To reconfigure the VXFEN module
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Stop VCS.
# hastop -local
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Unconfigure the VXFEN module.
# /sbin/vxfenconfig -U
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Unload the module.
# /etc/init.d/vxfen stop
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Edit the /etc/sysconfig/vxfen file.
For example, change the entry from:
vxfen_min_delay=0
to:
vxfen_min_delay=30
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Start the VXFEN module.
# /etc/init.d/vxfen start
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Start VCS.
# hastart
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Bring the service groups online.
# hagrp -online oragrp -sys galaxy
