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| layout | title | parent | nav_order |
|---|---|---|---|
| default | Discovery and gateway settings | Configuring OpenSearch | 30 |
Discovery and gateway settings
The following are settings related to discovery and local gateway.
To learn more about static and dynamic settings, see Configuring OpenSearch.
Discovery settings
The discovery process is used when a cluster is formed. It consists of discovering nodes and electing a cluster manager node. OpenSearch supports the following discovery settings:
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discovery.seed_hosts(Static, list): The list of hosts that perform discovery when a node is started. The default list of hosts is["127.0.0.1", "[::1]"]. -
discovery.seed_providers(Static, list): Specifies the types of seed hosts provider to use for obtaining seed node addresses in order to start the discovery process. -
discovery.type(Static, string): By default, OpenSearch forms a multi-node cluster. Setdiscovery.typetosingle-nodeto form a single-node cluster. -
cluster.initial_cluster_manager_nodes(Static, list): A list of cluster-manager-eligible nodes used to bootstrap the cluster.
Gateway settings
The local gateway stores cluster state and shard data that is used when a cluster is restarted. OpenSearch supports the following local gateway settings:
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gateway.recover_after_nodes(Static, integer): After a full cluster restart, the number of nodes that must join the cluster before recovery can begin. -
gateway.recover_after_data_nodes(Static, integer): After a full cluster restart, the number of data nodes that must join the cluster before recovery can begin. -
gateway.expected_data_nodes(Static, integer): The number of data nodes expected to exist in the cluster. After the expected number of nodes joins the cluster, recovery of local shards can begin. -
gateway.recover_after_time(Static, time value): The amount of time to wait before starting recovery if the number of data nodes is less than the expected number of data nodes.