Data store high availability

A messaging engine in a cluster bus member can fail over between servers in the cluster, but the messaging engine must be able to access the saved state in its data store from any of the cluster servers.

Each messaging engine on a service integration bus belongs to one high availability group (HAGroup). The members of each HAGroup are controlled by a policy assigned to the group at run time. This core group policy determines the availability characteristics of the messaging engine in the HAGroup, including which servers the messaging engine can run on, including the choice of server to which the messaging engine can fail over. If the cluster bus member in which a messaging engine is running fails, the data store that the messaging engine uses must be accessible from the server to which the messaging engine moves.

Subtopics

• Data store topologies
  The topology defines the relative location of a data store and its messaging engine, as well as the relationship with other data stores.
• Highly available databases
  Highly available databases are highly scalable and depend on a relational database management system (RDBMS) that is always running. Restrictions apply when we choose a highly available database as the data store for the messaging engine.

Configure a core group policy for messaging engines

Configure high availability and workload sharing of service integration