Grass Valley K2 Storage System Instruction Manual v.3.3 - Manual (Page 134)

134 K2 Storage System Instruction Manual June 25, 2009
Chapter 3 Installing the Level 10R Storage System
Failover behaviors
If a fault occurs and one of the failover mechanisms is triggered, an online redundant
iSCSI K2 Storage System behaves as explained in the following sections.
The diagrams that follow are representative of a generic redundant K2 Storage
System. Some details, such as the number of media connections, might not be the
same as your K2 Storage System. These diagrams illustrate the media (iSCSI) and
control paths as they interact with the redundant K2 Media Servers in their role of
media file system/database server and iSCSI bridge. Interactions of FTP traffic and/
or paths involving K2 Media Servers with other roles are not illustrated.
Pre-failover behavior
The system operates initially with both media and control traffic on GigE switch “A”
and K2 Media Server “A”. Media (iSCSI) traffic is using media network “A”. The
iSCSI adapters (TOEs) on the “A” K2 Media Server provide access to the Fibre
Channel connected RAID storage. K2 Media Server “A” is the media file system/
database server.
K2 RAID
K2 Media
Servers
K2 clients
Gigabit
Ethernet
switches
A
A B
B
Fibre Channel
connections
Control
Media
Control
Media
Control
FTP
Media
Media
! K2 S ATA S T O R A G E
!
!
K2 S D I M E D I A C L I E N T
!
K2 S D I M E D I A C L I E N T
!
K2 S D I M E D I A C L I E N T
K2 M E D I A S E R V E R
Control
FTP
Media
Media
K2 M E D I A S E R V E R
ISLs