High availability network components



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The foundation for a highly available environment is dependent on the network that is created for this environment. The WAS high availability manager, by default, uses a channel framework network protocol model to establish network connections. This model enables network ports to be shared among all of the channels within a transport chain. A unicast protocol, which supports communication between a specific receiver and a specific sender, or a multicast protocol, which supports open communication to all receivers, can also be used.

The following components are important parts of a high availability network:

A high availability environment ties all of the network components together. It provides the basis for providing peer-to-peer failover. The moment a component loses its network connection to the rest of the infrastructure, the high availability manager assumes a failure has occurred and assumes the work assigned to that component.

Thousands of high availability groups can exist within a core group. The policies that are associated with a high availability group control how and when members of that group are activated. A group services mechanism is used to communicate high availability group membership information between members of a core group. This information includes the group services that are available and the lightweight component groups that are part of a high availability group.

The group services mechanism also supports the following types of messaging between core group members.


See Also

Transport protocol for a high availability manager




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