Different types of high availability techniques can be used with the CM core components Certificate Factory (CF) and Certificate Issuing System (CIS):

• Active/passive dual-node hardware cluster using clustering software supported by the OS: Microsoft Windows Server Failover Clustering and Red Hat Cluster High Availability.
• Active/active, unlimited number of active nodes behind a load balancer. This alternative provides performance scalability in addition to HA.
• High Availability functionality as provided in virtualization software solutions, for example, VMware vSphere HA.