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

Closes #24836
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Luca Cavanna 2017-06-02 11:13:47 +02:00 committed by GitHub
parent 6dea5f14c3
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8
docs/reference/modules/cross-cluster-search.asciidoc
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@ -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.
@ -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`::