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How to configure a cluster with partial Infiniband connection.
Suppose you have a logical MOSIX cluster that consists of two physical
clusters, each connected by both Ethernet and Infiniband, but the physical
clusters are only connected between them by Ethernet:
First configure the nodes within each physical cluster (including the
local node) by their Infiniband IP address and the nodes in the other
physical cluster by their Ethernet address.
Next, using "mosconf", select: "1. Which nodes are in this cluster",
then type "+" to turn on the advanced features,
then type "a" to define aliases and for each node in
the other cluster, define its Inifiniband IP address (despite being
unreachable from the node that is being configured) as an alias to its
Ethernet IP address.