Understanding High Availability in Vocera Platform

Clustering is a mode of replication between two nodes to implement fault tolerance to your system. The clustering schema implements a highly available (HA) environment, providing a continued level of service over a period of time.

Vocera Platform is focused on supplying a system for the delivery of contextual alerts and alarms without any downtime. The database (DB) and voice clustering features provide high availability to support your system in the event of a hardware or software failure.

In the event of a failure, the system must be able to recover and continue to process information. Vocera Platform uses an active-standby high availability (HA) model to continue processing information. In an active-standby HA model, all data on the active node is replicated to the standby node, allowing the standby node to remain synchronized and ready to transition to the active role. When failover occurs, the new active node takes over the Virtual IP (VIP) address assigned to the cluster, switches the database out of replication mode, and activates all adapters.

In Vocera Platform a cluster maintains a virtual IP address (VIP) that acts like a cluster-manager. The VIP is always assigned to the active node. All external traffic is targeted at the VIP and routed to the active node, automatically.