6.5

Cloned Servers
Servers that have identical conguration settings, names, applications, Security Identiers (SIDs) and IP
addresses, following the installation of vCenter Server Heartbeat.
Cloning Process
The vCenter Server Heartbeat process whereby all installed programs, conguration settings, and the
machine name, Security Identier (SID), and IP address are copied to another server.
Cluster
A generic term for a vCenter Server Heartbeat Pair and the set of machines (physical or virtual) involved
in supporting a single protected server.
Connection
Also referred to as Cluster Connection. Allows the 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 (les and registry) from the active to the passive server 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 re. DR protection can be achieved by placing the Secondary server (in a Pair) at
an osite 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
server.
Failover
Failover is the process by which the passive server assumes the active role when it no longer detects that
the active server is alive as a result of a critical unexpected outage or crash of a server.
Full System Check (FSC)
The internal process automatically started at the initial connection or manually triggered through the
vCenter Server Heartbeat Console to perform verication on the les and registry keys and then synchronize
the dierences.
Fully Qualied Domain Name (FQDN)
Also known as an absolute domain name, a FQDN species its exact location in the tree hierarchy of the
Domain Name System (DNS). It species all domain levels, including the top-level domain, relative to
the root domain. Example: somehost.example.com., where the trailing dot indicates the root domain.
102 VMware, Inc.
Administrator Guide