The quorum device includes configuration information for the cluster and is shared by all cluster members. The quorum device must be on a raw partition and must be accessible to all nodes that host cluster instances.
Adaptive Server Cluster Edition uses the quorum disk for:
A location to perform cluster membership management, including voting and arbitration for members joining
A persistent place to store configuration data used by instances and the UAF
A communications medium and synchronization point
The quorum device includes information about:
The name of the cluster, the number of instances in the cluster, the path to the directories containing the interfaces file, log files, master device, and other required configuration information
Cluster view records that indicate the state (up or down) of each instance in the cluster
The area that Adaptive Server uses to determine the proper cluster membership when an instance failure is detected
Create the quorum device when you configure the cluster (see the Installation Guide). After the initial configuration, use sybcluster or the qrmutil utility to back up, restore, and reconfigure the quorum device. See the Utility Guide for more information.
