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9-2
C122-B001-02EN
CHAPTER 9 Clustering
For inter-node communication of management information on the PRIMEQUEST
cluster system, a management LAN of 100 Mbps is used. As with the MMB that
monitors errors in each node, the management LAN is duplicated. Because an error
during communication to each node and an error in the MMB may otherwise cause
the entire system to stop, the management LAN and MMB are duplicated to increase
the reliability of the system. TCP/IP is used as the communication protocol to prevent
data delay and loss when the amount of information on the communication path
between a active node and a standby node increases temporarily.
Cluster operation modes are described below.
1:1 standby
A standby node is prepared for the active node. This configuration features a high
redundancy where operation can continue even if the active node fails.
Figure 9.1 Example for 1:1 standby
Node A
Node B
Node A
Node B
Error
Error
When node
A is faulty
Active
Active
Standby
Содержание PRIMEQUEST 440
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