HA for MySQL Cluster enables the Oracle Solaris Cluster software to manage MySQL Cluster by providing components to perform the orderly startup, shutdown, and fault monitoring of MySQL Cluster processes. When a MySQL Cluster database cluster is managed by the HA for MySQL Cluster data service, the MySQL Cluster instances become scalable or multiple-master resources across the Oracle Solaris Cluster nodes.
A MySQL Cluster instance on top of Oracle Solaris Cluster software consists of the ndbd server, the ndb management server, the ndb shutdown controller, and MySQL Cluster Servers. You can configure HA for MySQL Cluster components as a scalable or multiple-master service. You cannot configure HA for MySQL Cluster components as a failover service. The only exception is the MySQL Cluster Server component.
For conceptual information about failover data services, multiple-masters data services, and scalable data services, see Oracle Solaris Cluster 4.3 Concepts Guide .