Arbitration For Data Integrity in Serviceguard Clusters, July 2007

Arbitration for Data Integrity in Serviceguard Clusters
To Arbitrate or Not to Arbitrate
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In Figure 2, on the other hand, a single node failure would result in the
loss of heartbeat communication. In the no-arbitration model, the loss of
heartbeat would be interpreted by the cluster manager as a failure of
node 1, and therefore the cluster could re-form with packages failing over
from node 1 to node 2.
Figure 2 Single Node Failure
No Arbitration—Multiple Media
It is possible to define multiple membership paths for intra-cluster
communication that employ different types of communication from node
to node. One path could use conventional LAN links, while a second path
might employ a disk.
This model is illustrated in Figure 3. Both a LAN connection and a disk
link provide redundant membership communication.