17.1 Approaches to NNMi data resilience
NNMi supports two approaches to protecting the NNMi data in case of hardware failure:
Application failover
NNMi application failover provides for disaster recovery by maintaining a copy of the NNMi database transaction logs on an identically configured system. For details, see 18. Configuring NNMi for Application Failover.
Running in a high availability (HA) cluster
Running NNMi in an HA cluster provides for nearly 100 percent availability of the NNMi management server by maintaining the NNMi database and configuration files on a shared disk. For details, see 19. Configuring NNMi in a High Availability Cluster.
In both approaches, if the current NNMi management server fails, the second system automatically becomes the NNMi management server.