Hitachi

JP1 Version 12 JP1/Network Node Manager i Setup Guide


18.1 Application failover overview

The application failover feature multiplexes the NNMi management server without using a shared disk or cluster software.

When you configure two NNMi management servers, one as the active server and the other as a standby server, you can continue monitoring the network by transferring the NNMi functionality to the standby server when an error occurs in the active server.

This application failover feature is implemented based on NNMi's unique cluster manager (nnmcluster process) control and has features that differ from those of an HA configuration, which links to cluster software. Note that the application failover configuration is sometimes referred to as the NNMi cluster (or simply the cluster) in the manual and in Help.

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The application failover feature is available for NNMi installations that use an NNMi database. After configuring your systems to use the application failover feature, NNMi detects an NNMi management server failure and triggers a standby server to assume NNMi functionality.

The following terms and definitions apply to configuring NNMi for application failover: