Grass Valley K2 Storage System Instruction Manual v.3.3 - Manual (Page 244)

244 K2 Storage System Instruction Manual June 25, 2009
Chapter 5 Installing the Level 20R Storage System
Control team failover behavior
If the following system connection fails to respond to network communication:
• The control connection between a K2 Media Client and GigE switch “A”.
Then the following failover behavior occurs:
1. The control team on the K2 Media Client fails over and communication begins on
the other control port.
2. The control communication finds a path through GigE “B” switch and across an
ISL to GigE switch “A” to reach the same control port on the same K2 Media
Server.
3. Media (iSCSI) traffic keeps using the same path.
4. K2 Media Server “A” is still the media file system/database server. The media file
system (SNFS) and media database (SQL) do not fail over.
5. The other K2 Media Clients (not affected by the connection failure) keep using the
same paths for media and control, as in the previous diagram “Pre-failover
behavior” .
K2 RAID
K2 Media
Servers
K2 client
Connection
Failure
Gigabit
Ethernet
switches
A
A B
B
Fibre Channel
connections
Control
Media
Control
Media
Control
FTP
Media
Media
! K2 S A S S T O R A G E
! 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
X