Control team failover behavior, Chapter 4 installing the level 2r storage system – Grass Valley K2 Storage System Instruction Manual v.3.1 User Manual
Page 144
144
K2 Storage System Instruction Manual
September 6, 2006
Chapter 4 Installing the Level 2R 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”
.
L2R RAID chassis
K2 Media
Servers
K2 Media
Client
Connection
Failure
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
X