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(See https://spaces.internet2.edu/display/SHIB2/IdPCluster
)
The terracotta software is can be used to cluster the IdP nodes. Note that currently the Cams IdPs are not clustered, so terracotta should not be running. Each node must run the terracotta server, as well as the instrumented client (tomcat, in our case). The terracotta server operates in either the active or passive role; only one server should be in the "active/coordinator" state at a time.
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