Starting the VCS engine (HAD) and related processes


Starting the VCS engine (HAD) and related processes
Prev	Starting VCS	Next

The command to start VCS is invoked from the following file:

/etc/init.d/vcs.rc

When VCS is started, it checks the state of its local configuration file and registers with GAB for cluster membership. If the local configuration is valid, and if no other system is running VCS, it builds its state from the local configuration file and enters the RUNNING state.

If the configuration on all nodes is invalid, the VCS engine waits for manual intervention, or for VCS to be started on a system that has a valid configuration.

See System states.

To start the VCS engine

Run the following command:
```
# hastart
```

To start the VCS engine when all systems are in the ADMIN_WAIT state

Run the following command from any system in the cluster to force VCS to use the configuration file from the system specified by the variable system:
```
# hasys -force system
```

To start VCS on a single-node cluster

Type the following command to start an instance of VCS that does not require GAB and LLT. Do not use this command on a multisystem cluster.
```
# hastart -onenode
```