AC2000 Multi-node Server Failover

In a world where increasing automation services are depended upon, system administrators turn towards additional options designed to increase system resilience and high availability. The AC2000 Multi-node Failover or hot standby system solution provides HADR (High availability Disaster Recovery) solutions. The AC2000 Multi-node Server Failover HADR solution supports up to up to four nodes failover cluster, supporting one primary server and a maximum of three secondary servers or nodes.

A failover cluster is a group of independent computers that work together to increase the availability of applications and services. The clustered servers (called nodes) are connected by physical cables and by software. If one of the cluster nodes fails, another node begins to provide service (a process known as failover).

As a minimum the solution requires at least one primary server and one secondary server, a.k.a. a two-node option.

The system uses Linux Distributed Replicated Block Device (DRBD) technology. DRBD replicates data from the primary to the secondary nodes. Cluster Resource Manager (CRM) controls which server or node runs the AC2000 software.

AC2000 failover nodes can be purchased as software only licences, and optionally as hardware PC server units bundles with preconfigured failover software licences. Contact CEM in advance if special (non default) IP addressing of the hardware node option is required before shipping.


  • Up to a maximum of four nodes in failover cluster
  • High availability disaster recovery solution
  • One primary node (CDC) and one, two or three secondary nodes
  • CDC/RTC combination server supported as single primary node
  • Choice of standard and RAID hardware supported
  • Virtual nodes supported
  • Notifications to AC2000 monitoring software on node status