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[DOCS] Clarify connections and gateway nodes selection in cross cluster search docs #24859

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javanna merged 2 commits into from
Jun 2, 2017
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[DOCS] Clarify connections and gateway nodes selection in cross cluster search docs #24859

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[DOCS] Clarify connections and gateway nodes selection in cross clust…
javanna May 24, 2017
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add missing parentheses
javanna Jun 2, 2017
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8 changes: 7 additions & 1 deletion docs/reference/modules/cross-cluster-search.asciidoc
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Expand Up @@ -10,7 +10,12 @@ federated search requests.

Cross cluster search works by configuring a remote cluster in the cluster state and connecting only to a
limited number of nodes in the remote cluster. Each remote cluster is referenced by a name and a list of seed nodes.
Those seed nodes are used to discover nodes in the remote cluster which are eligible as _gateway nodes_.
When a remote cluster is registered, its cluster state is retrieved from one of the seed nodes so that up to 3
_gateway nodes_ are selected to be connected to as part of upcoming cross cluster search requests.
Cross cluster search requests consist of uni-directional connections from the coordinating node to the previously
selected remote nodes only. It is possible to tag which nodes should be selected through
node attributes (see <<cross-cluster-search-settings>>).

Each node in a cluster that has remote clusters configured connects to one or more _gateway nodes_ and uses
them to federate search requests to the remote cluster.

Expand Down Expand Up @@ -169,6 +174,7 @@ will be prefixed with their remote cluster name:
// TESTRESPONSE

[float]
[[cross-cluster-search-settings]]
=== Cross cluster search settings

`search.remote.connections_per_cluster`::
Expand Down