Grass Valley K2 Storage System Instruction Manual v.3.2 Aug.01 2007 - Manual (Page 123)

July 3, 2007 K2 Storage System Instruction Manual 123
Failover behaviors
K2 Media Server failover behavior
If the following system connection or component fails to respond to network
communication:
Then the following failover behavior occurs:
1. The media file system (SNFS) and media database (SQL) on K2 Media Server “A”
fail over and K2 Media Server “B” becomes the active media file system/database
server.
2. All K2 Media Clients drop communication on the “A” media port and begin using
the “B” media port, finding a path through GigE switch “B” to K2 Media Server
“B”. All K2 Media Clients use an iSCSI adapter (TOE) on the “B” K2 Media
Server to provide access to the Fibre Channel connected RAID storage.
3. All K2 Media Clients keep communicating on the same control port, finding a new
path through GigE switch “A” and across an ISL to GigE switch “B” to reach K2
Media Server “B”.
!
Either of the Media (iSCSI) network “A” connections between the GigE switch and the K2 Media
Server
"
The control connection between GigE switch “A” and K2 Media Server “A”
#
K2 Media Server “A”
$
The Fibre Channel connection between K2 Media Server “A” and RAID controller “A”
L2R RAID chassis
K2 Media
Servers
K2 Media
Clients
Gigabit
Ethernet
switches
A
A B
B
Fibre Channel
connections
Control
Media
Control
Media
Control
FTP
Media
POWER SERVICE K2 RAID STORAGE !
!
!
!
!
Media
Control
FTP
Media
Media
ISLs
XX
X
X
X
3
4
1
2