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Change doc: reflect WeaklyUp is used in DD #21502

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Jeroen Gordijn 2016-09-20 17:41:37 +02:00
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akka-docs/rst/java/distributed-data.rst
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@ -41,8 +41,12 @@ with a specific role. It communicates with other ``Replicator`` instances with t
``akka.cluster.ddata.DistributedData`` extension.
Cluster members with status :ref:`WeaklyUp <weakly_up_java>`, if that feature is enabled,
will currently not participate in Distributed Data, but that is something that should be possible to
add in a future release.
will participate in Distributed Data. This means that the data will be replicated to the
:ref:`WeaklyUp <weakly_up_java>` nodes with the background gossip protocol. Note that it
will not participate in any actions where the consistency mode is to read/write from all
nodes or the majority of nodes. The :ref:`WeaklyUp <weakly_up_java>` node is not counted
as part of the cluster. So 3 nodes + 5 :ref:`WeaklyUp <weakly_up_java>` is essentially a
3 node cluster as far as consistent actions are concerned.
Below is an example of an actor that schedules tick messages to itself and for each tick
adds or removes elements from a ``ORSet`` (observed-remove set). It also subscribes to