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@@ -32,6 +32,9 @@ words, federated search requests will have to be sent specifically to those
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nodes. Remote clusters set via the <<cluster-update-settings,cluster settings API>>
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will be available on every node in the cluster.
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+[WARNING]
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+This feature was added as Beta in Elasticsearch `v5.3` with further improvements made in 5.4 and 5.5. It requires gateway eligible nodes to be on `v5.5` onwards.
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+
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The `elasticsearch.yml` config file for a _cross cluster search_ node just needs to list the
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remote clusters that should be connected to, for instance:
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Clinton Gormley