About VXFEN tunable parameters

VXFEN tunable parameters describes tunable parameters for the VXFEN driver.

VXFEN tunable parameters

vxfen Parameter

Description and Values: Default, Minimum, and Maximum

vxfen_debug_sz 

 

Size of debug log in bytes 

  • Values

    Default: 65536

    Minimum: 65536

    Maximum: 256K

vxfen_max_delay and vxfen_min_delay 

(See below.) 

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. 

vxfen_max_delay 

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. 

  • Values

    Default: 60

    Minimum: 0

    Maximum: 600

vxfen_min_delay 

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. 

  • Values

    Default: 1

    Minimum: 0

    Maximum: 600

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

  1. Stop VCS.

    # hastop -local

  2. Unconfigure the VXFEN module.

    # /sbin/vxfenconfig -U

  3. Unload the module.

    # /usr/sbin/kcmodule vxfen=unused

  4. Configure the tunable parameter.

    # /usr/sbin/kctune tunable=value

    For example:

    # /usr/sbin/kctune vxfen_min_delay=100

  5. Start the VXFEN module.

    # /sbin/init.d/vxfen start

  6. Start VCS.

    # hastart

  7. Bring the service groups online.

    # hagrp -online oragrp -sys galaxy