Harmonic MediaGrid Installation And Configuration Manual page 15

Introduction
The ContentServer provides storage capacity for holding user data, processing for file

serving functions, and network bandwidth for client access. ContentServers can be used to
manage ContentStores, which provide additional storage.
ContentStore
The

additional storage bandwidth and capacity for holding user data.
A ContentServer

file serving functions. If one controller is down, the second controller takes over the
processes.
CX4 is a copper-based interface cable used to connect the Network Switches. The 10GbE

connections use CX4 and multi-mode fiber cables. These cables have a limit of 1 5 meters.
A Domain is a group of computers running the same Windows operating system that also

share the same directories. Refer to Domain Controller.
A Domain Controller is the server that responds to authentication requests and manages

access to resources within a Windows domain.
A File system is a way of storing data, making the data accessible to client computers.

FSD (File System Driver) is software installed on a client platform to allow standard file

system access to the Harmonic MediaGrid.
FTP (File Transfer Protocol) is an interface used by a computer user to exchange files

between computers. Refer to ContentBridge.
Group refers to a collection of one or more ContentServers in a Harmonic MediaGrid.

NFS (Network File System) is a protocol that allows access to files from a client computer

over a network.
A Slice is a segment of a file. Each file splits into one or more slices when stored, with each

slice stored on a different ContentServer. Each slice carries information indicating to which file
and where in that file it belongs.
Stretch Cluster
A

additional level of data protection. For details, refer to
A Subnet is a smaller network within a network.

The SystemManager is comprised of both hardware (SystemManager platform) and software

(SystemManager application) components that communicate with the Harmonic MediaGrid
network over Ethernet, providing software update capability, network management,
configuration, security and fault monitoring services. See the Harmonic SystemManager
Installation Guide and the Harmonic SystemManager User Guide.
UI refers to the SystemManager application's User Interface, viewed through a Web browser.

Volume refers to a collection of one or more Groups and their associated ContentServers in a

Harmonic MediaGrid.
A VLAN (Virtual Local Area Network) is a network of computers that behave as if physically

connected, even though they may connect to different segments of a LAN.

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is a storage device, which can be connected to a ContentServer to provide
Controller
is the node within a ContentStore which performs processing for
is a cluster stretched across two sites, which uses replication to provide an
15
Documentation Terms and Abbreviations
About a Harmonic MediaGrid Stretch
Harmonic MediaGrid Release 4.1
Cluster.