Grass Valley K2 Storage System Instruction Manual v.3.1 - Manual (Page 194)

194 K2 Storage System Instruction Manual September 6, 2006
Chapter 6 Installing the Level 3R Storage System
Level 3R system description
The Level three redundant (Level 3R) storage system has four K2 media servers. They
are configured as two redundant pairs. In this diagram, media servers 1A and 2A each
take on a subset of the media server roles. For example, server 1A takes the roles of
media file system server, database server, and iSCSI bridge, while server 2A takes the
roles of FTP server, NAS server, and iSCSI bridge. The four media servers provide a
total of four iSCSI media connections for increased bandwidth. Media server 1B is
the redundant server to 1A. Media server 2B is the redundant server to 2A. In addition,
the Level three redundant storage system has one L3R RAID chassis. Up to five
optional Expansion chassis are available for increased storage capacity.
K2 Media Clients have a pair of redundant (teamed) Gigabit Ethernet ports for control
and two Gigabit Ethernet ports (A and B) for media (iSCSI). Each port of the control
team is connected to a different switch. The A media port goes to the A GigE switch
and the B media port goes to the B GigE switch. The GigE switches are configured
with V-LANs to keep the control/FTP and media (iSCSI) traffic separate.
Each K2 Media Server has two GigE connections for media, one GigE connection for
control, and one Fibre Channel connection to the RAID storage. Only K2 Media
Servers with the role of FTP server (2A and 2B) have the GigE connection for FTP.
All GigE connections on a server go to the same GigE switch. The media server hosts
iSCSI interface cards for the GigE media connections and a Fibre Channel card for
the RAID storage connection. The iSCSI interface cards provide a bridge between
GigE iSCSI and Fibre Channel SCSI. Each media server also runs the software
components that allow it to function in its specific roles. Redundant K2 Media Servers
L3R RAID chassis
L3R RAID Expansion
chassis (optional)
K2 media
servers
1A
A B
2A 1B 2B
Multiple iSCSI clients
Gigabit Ethernet
switches
Fibre Channel
connections
Control B Media B Control A Media A
Control A Media A Control B Media B
Control
FTP
Media Media Control Media Media Control
FTP
Media Media Control Media
POWER SERVICE K2 RAID STORAGE !
POWER SERVICE K2 RAID STORAGE !
POWER SERVICE K2 RAID STORAGE !
POWER SERVICE K2 RAID STORAGE !
! ! !
Media
Control point PC
Control
ISLs
Control Control
FTP/streaming
Control B Media B Control A Media A