Symantec 5 User Manual
Configuring GAB when adding a node to a single node cluster
VCS uses the Group Membership Services/Atomic Broadcast (GAB) protocol for
cluster membership and reliable cluster communications. GAB has two major
functions.
cluster membership and reliable cluster communications. GAB has two major
functions.
It handles the following tasks:
■
Cluster membership
■
Cluster communications
To configure GAB, use vi or another editor to set up an /etc/gabtab configuration
file on each node in the cluster. The following example shows an /etc/gabtab file:
file on each node in the cluster. The following example shows an /etc/gabtab file:
/sbin/gabconfig -c -nN
The
-c
option configures the driver for use. The
-nN
specifies that the cluster is
not formed until at least N systems are ready to form the cluster. By default, N is
the number of systems in the cluster.
the number of systems in the cluster.
Note:
Symantec does not recommend the use of the
-c -x
option for
/sbin/gabconfig
. Using
-c -x
dramatically increases configuration time for the
Gigabit Ethernet controller and can lead to a split-brain condition.
Starting LLT and GAB
On the new node, start LLT and GAB.
To start LLT and GAB
1
Start LLT on Node B.
#
/etc/init.d/llt start
2
Start GAB on Node B.
#
/etc/init.d/gab start
Reconfiguring VCS on the existing node
Reconfigure VCS on the existing nodes.
149
Installing VCS on a single node
Adding a node to a single-node cluster