System reliability is an estimate of the probability of failure. There are a number of ways of improving reliability using backup facilities. In the case of NMS, this can take the form of protecting the central database. Failure of the database is usually fatal, and for this reason, many database vendors provide a failover capability. The user can deploy a backup version of the database that runs in parallel with the primary system. Failure of the primary results in a full switchover to the secondary. NNM ReliabilityNNM collection stations can be configured to failover to remote management stations . This allows for continuous monitoring of the network. |