Grass Valley K2 Summit Storage Area Network v.7.1 - Manual (Page 368)

26 October 2009 K2 Storage Area Network Installation and Service Manual 368
Failover behaviors
K2 Media Server failover with Control team failover behavior
If the following system component fails to respond to system communication:
• The “A” GigE switch
Then the following failover behavior occurs:
1. The media file system (SNFS) and media database on K2 Media Server “A” fail
over and K2 Media Server “B” becomes the active media file system/metadata
server.
2. All K2 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 clients use an iSCSI adapter (TOE) on the “B” K2 Media Server to provide
access to the Fibre Channel connected RAID storage.
3. For all K2 clients, communication fails on the control port, so the control team fails
over and communication begins on the other control port.
4. For all K2 clients, control communication finds a path through GigE switch “B” to
K2 Media Server “B”.
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 A S S T O R A G E
! K2 S D I M E D I A C L I EN T
!
K2 S D I M E D I A C L I EN T
!
K2 S D I M E D I A C L I EN T
!
K2 S D I M E D I A C L I EN 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
Component
Failure