6.6

Cloned Servers
Servers that have identical configuration settings, names, applications, Security Identifiers (SIDs) and IP
addresses, following the installation of vCenter Server Heartbeat.
Cloning Process
The vCenter Server Heartbeat process whereby all installed programs, configuration settings, and the
machine name, Security Identifier (SID), and IP address are copied to another node.
Cluster
A generic term for a vCenter Server Heartbeat Pair and the set of machines (physical or virtual) involved
in supporting a single protected node.
Connection
Also referred to as Cluster Connection. Allows an administrator to communicate with a vCenter Server
Heartbeat Cluster, either on the same machine or remotely.
Crossover Cable
A network cable that crosses the transmit and receive lines.
Data Replication
The transmission of protected data changes (files and registry) from the active to the passive node via the
VMware Channel.
Degraded
The status reported for an application or service that has experienced an issue that triggered a Rule.
Device Driver
A program that controls a hardware device and links it to the operating system.
Disaster Recovery (DR)
A term indicating how you maintain and recover data with vCenter Server Heartbeat in event of a disaster
such as a hurricane or fire. DR protection is achieved by placing the Secondary node (in a Pair) at an
offsite facility, and replicating the data through a WAN link.
DNS (Domain Name System) Server
Provides a centralized resource for clients to resolve NetBIOS names to IP addresses.
Domain
A logical grouping of client server based machines where the administration of rights across the network
are maintained in a centralized resource called a domain controller.
Domain Controller (DC)
The server responsible for maintaining privileges to domain resources; sometimes called AD controller in
Windows 2003 and above domains.
Dualed
A way to provide higher reliability by dedicating more than one NIC for the VMware Channel on each node.
Failover
A process by which the role of the passive node is changed to active automatically in an “Failover
(Automatic)”, or the active node and the passive node switch roles in a “Failover (Manual)” failover.
Failover (Automatic)
Failover is the process by which the passive node assumes the active role when it no longer detects that
the active node is alive as a result of a critical unexpected outage or crash of a node.
Failover (Manual)
The graceful transfer of control and application service to the passive node.
Full System Check (FSC)
The internal process automatically started at the initial connection or manually triggered through the vCenter
Server Heartbeat Console to perform verification on the files and registry keys and then synchronize the
differences.
98 VMware, Inc.
vCenter Server Heartbeat Administrator's Guide