Cassandra seed nodes and clients connecting to nodes?

Your answer is right. The only thing I would add is that it's recommended to use the same seed list (i.e. In your cassandra.

Yaml) across the cluster, as a "best practices" sort of thing. Helps gossip traffic propagate in nice, regular rates, since seeds are treated (very minimally) differently by the gossip code (see http://wiki.apache.org/cassandra/ArchitectureGossip).

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