CCS – Cluster Configuration System

• CCS is the configuration system that maintains the static information about the cluster.

• • It is kept in an XML file: /etc/cluster/cluster.conf. The GUI interface for editing it is system-config-cluster.

• The daemon, ccsd, runs on each node of the cluster and supplies configuration information to the other cluster components higher up the stack.

• When running in quorate mode, it ensures all nodes hold consistent information. If the local cluster.conf files differ, it uses the most-recently-changed version. Updates can be made to the configuration while the daemon is running.