<ul><li>Amazon OpenSearch Service has released dedicated coordinator nodes for its OpenSearch domains.</li><li>Data nodes in Amazon OpenSearch Service perform coordination for data-related requests.</li><li>This leads to hotspots forming and resource scarcity, causing node failures.</li><li>Dedicated coordinator nodes limit request coordination and dashboard hosting to the coordinator nodes, and request processing to the data nodes.</li><li>This results in more resilient and scalable domains.</li><li>Adding coordinator nodes leads to higher indexing and search throughput.</li><li>Additionally, it results in more resilient clusters, as each node has a specific function.</li><li>Dedicated coordinator nodes separate a cluster’s coordination capacity from the data storage capacity.</li><li>With dedicated coordinator nodes, you can achieve up to a 90% reduction in the number of IP addresses reserved by the service in your VPC.</li><li>It is recommended to set the count of coordinator nodes to 10% of the number of data nodes.</li></ul>

Improve OpenSearch Service cluster resiliency and performance with dedicated coordinator nodes

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