Veritas Storage Foundation 5.1 SP1 for Oracle RAC Administrator"s Guide (5900-1512, April 2011)

Table 5-2
GAB dynamic tunable parameters (continued)
Description and commandGAB parameter
Default: Disabled
This option allows the user to configure the behavior of the VCS engine
or any other user process when one or more nodes rejoin a cluster
after a network partition. By default GAB will not PANIC the node
running the VCS engine. GAB kills the userland process (the VCS
engine or the vxconfigd process). This recycles the user port (port h
in case of the VCS engine) and clears up messages with the old
generation number programmatically. Restart of the process, if
required, must be handled outside of GAB control, e.g., for hashadow
process restarts _had.
When GAB has kernel clients (such as fencing, VxVM, or VxFS), then
the node will always PANIC when it rejoins the cluster after a network
partition. The PANIC is mandatory since this is the only way GAB can
clear ports and remove old messages.
Use the following command to enable system halt on rejoin:
gabconfig -j
Use the following command to disable system halt on rejoin:
gabconfig -J
Halt on rejoin
Default: Disabled
If this option is enabled, then GAB prevents the system from
PANICKING when the VCS engine or the vxconfigd process fail to
heartbeat with GAB and GAB fails to kill the VCS engine or the
vxconfigd process. GAB will try to continuously kill the VCS engine
and will not panic if the kill fails.
Repeat attempts to kill process if it does not die
gabconfig -k
Keep on killing
249Tunable parameters
About GAB tunable parameters