2.17. High Availability support in PSM

High availability clusters can stretch across long distances, such as nodes across buildings, cities or even continents. The goal of HA clusters is to support enterprise business continuity by providing location-independent load balancing and failover.

In high availability (HA) mode, two PSM units (called master and slave nodes) having identical configuration are operating simultaneously. The master shares all data with the slave node, and if the master node stops functioning, the other one becomes immediately active, so the servers are continuously accessible.

You can find more information on managing a high availability PSM cluster in Section 6.3, Managing a high availability PSM cluster.

Balabit recommends using a high availability PSM cluster instead of a standalone PSM appliance. A standalone PSM appliance can become a single point of failure (SPOF), and its failure can severely impact your business.