Grass Valley K2 Storage System Instruction Manual v.3.2 Aug.01 2007 - Manual (Page 174)

174 K2 Storage System Instruction Manual July 3, 2007
Chapter 5 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, servers 1A and 2A each
take on a subset of the 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 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 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 server also runs the software components that allow it
to function in its specific roles. Redundant K2 Media Servers with the role of media
file system/database server are connected by a serial cable which supports the
heartbeat signal required for automatic system recovery (failover) features.
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 Media
Control point PC
POWER SERVICE K2 RAID STORAGE !
POWER SERVICE K2 RAID STORAGE !
POWER SERVICE K2 RAID STORAGE !
POWER SERVICE K2 RAID STORAGE !
! ! !
Control
ISLs
Control Control
FTP/streaming
Control B Media B Control A Media A