HP ProLiant 4500 Compaq ProLiant Cluster HA/F100 and HA/F200 Administrator Gui - Page 56

The dual redundant loop feature of the Compaq ProLiant Cluster HA/F200

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Designing the Compaq ProLiant Clusters HA/F100 and HA/F200 2-25 The active data paths run from the active host bus adapters in the servers to the active storage hub. If this path fails, the applications can seamlessly fail over to the standby host bus adapter-to-storage hub data paths. A A S S Server Server storage hub storage hub Active Standby RA4000 Figure 2-14. Active hub-to-storage data path The second active data path runs from the active hub to the RA4000. If this path fails, the applications can seamlessly fail over to the standby hub-to-RA4000 data path. The dual redundant loop feature of the Compaq ProLiant Cluster HA/F200 increases the level of availability over clusters that have only one path to the shared storage. In addition, the second loop in the HA/F200 provides for improved performance through load balancing. Load balancing considerations are discussed in the "Load Balancing" section of this chapter.

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Designing the Compaq ProLiant Clusters HA/F100 and HA/F200
2-25
The active data paths run from the active host bus adapters in the servers to the
active storage hub. If this path fails, the applications can seamlessly fail over
to the standby host bus adapter-to-storage hub data paths.
storage hub
RA4000
storage hub
Server
Server
S
S
A
Active
Standby
A
Figure 2-14.
Active hub-to-storage data path
The second active data path runs from the active hub to the RA4000. If this
path fails, the applications can seamlessly fail over to the standby
hub-to-RA4000 data path.
The dual redundant loop feature of the Compaq ProLiant Cluster HA/F200
increases the level of availability over clusters that have only one path to the
shared storage. In addition, the second loop in the HA/F200 provides for
improved performance through load balancing. Load balancing considerations
are discussed in the “Load Balancing” section of this chapter.