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Merge branch 'master' into wip-2263-gossip-unreachable-patriknw

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	akka-cluster/src/main/scala/akka/cluster/Cluster.scala
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Patrik Nordwall 2012-06-25 20:59:50 +02:00
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16
akka-docs/cluster/cluster.rst
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@ -183,14 +183,20 @@ according to the Failure Detector is considered unreachable. This means setting
the unreachable node status to ``down`` automatically.
Seed Nodes
^^^^^^^^^^
The seed nodes are configured contact points for inital join of the cluster.
When a new node is started started it sends a message to all seed nodes and
then sends join command to the one that answers first.
It is possible to turn off automatic join.
Deputy Nodes
^^^^^^^^^^^^
After gossip convergence a set of ``deputy`` nodes for the cluster can be
determined. As with the ``leader``, there is no ``deputy`` election process,
the deputies can always be recognised deterministically by any node whenever there
is gossip convergence. The list of ``deputy`` nodes is simply the N - 1 number
of nodes (e.g. starting with the first node after the ``leader``) in sorted order.
The deputy nodes are the live members of the configured seed nodes.
It is preferred to use deputy nodes in different racks/data centers.
The nodes defined as ``deputy`` nodes are just regular member nodes whose only
"special role" is to help breaking logical partitions as seen in the gossip