eG Manager Redundancy
In the default deployment, eG Enterprise has a single central manager that receives performance metrics from the agents, detects anomalies, and sends email and SMS alerts to administrators regarding a probable problem condition. In this scenario, if for some reason the eG manager is rendered inaccessible, critical issues in the target infrastructure (e.g., failure of a network router, stopping of a key application process) will go unnoticed and therefore, unattended. To ensure high availability of the eG monitoring solution, eG Enterprise offers a redundant manager option wherein a secondary manager can act as an active standby for the primary manager. This capability, together with the ability to deploy redundant external agents in multiple locations, ensures that there is no single point of failure for the monitoring solution.
The Manager Redundancy is a license-controlled feature of eG Enterprise, and is governed by the Cluster Type option in the eG license. If the Cluster Type license option contains the value Not Supported, it indicates that the current installation of eG Enterprise supports a single manager only. If Cluster Type is set to Active-Active, then it indicates that manager redundancy has been enabled for that eG installation. A cluster can have a single primary manager and a single secondary manager. An Active-Active cluster is one where both the primary and secondary managers can both have agents reporting measures to them during normal operation (see Figure 1).