2.2.3 Reconfiguring quorum

Refer to the section "Adding and removing a node from CIM" for the GUI procedures.

CLI

The configuration can be changed at any time and is effective immediately. When a new node is added to the quorum set of nodes, the node being added must be part of the cluster so as to guarantee that the new node also has the same quorum configuration. Removing a node from the quorum set can be done without restriction.

When the configuration information is given to the command rcqconfig(1M) as arguments, it performs the transaction to CFREG to update the configuration information. Until CIM is successfully configured and gets the initial state of the quorum, CIM has to respond with the quorum state of False to all queries.

Example

In this example the cluster has formed but no quorum was established.

Display the states of all the nodes in the cluster as follows:

shasta1# cftool -n
Node    Number    State    Os    Cpu
shasta1    1    UP    Linux    Pentium
shasta2    2    UP    Linux    Pentium

Display the current quorum configuration as follows:
```
shasta1# rcqconfig -g
```

Nothing is displayed, since no nodes have been added so far.

Add new nodes in a quorum set of nodes as follows:
```
shasta1# rcqconfig -a shasta1 shasta2
```
Display the current quorum configuration parameters as follows:
```
shasta1# rcqconfig -g
QUORUM_NODE_LIST= shasta1 shasta2
```
Delete nodes from a quorum set of nodes as follows:
```
shasta1# rcqconfig -d shasta1
```
Display the current quorum configuration parameters after one node is deleted as follows:
```
shasta1# rcqconfig -g
QUORUM_NODE_LIST= shasta2
```

Add a new node, shasta10 (which is not in the cluster), in a quorum set of nodes as follows:

shasta1# rcqconfig -a shasta1 shasta2 shasta10
Cannot add node shasta10 that is not up.

Since CF only configured the cluster to consist of shasta1 and shasta2, shasta10 does not exist. The quorum set remains unchanged.
```
shasta1# rcqconfig -g
QUORUM_NODE_LIST= shasta2
```