Cardinality aggregation | Elasticsearch Guide [8.11] | Elastic
A single-value metrics aggregation that calculates an approximate count of distinct values. Assume you are indexing store sales and would like to count the unique number of sold products that match a query: response = client.search( index: 'sales', size: 0, body: { aggregations: { type_count: { cardinality: { field: 'type' } } } } ) puts response
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Elasticsearch, Fluentd, and Kibana: Open Source Log Search and Visualization | DigitalOcean
// Tutorial //Elasticsearch, Fluentd, and Kibana: Open Source Log Search and Visualization An Article from Fluentd Overview Elasticsearch, Fluentd, and Kibana (EFK) allow you to collect, index, search, and visualize log data. This is a great alternative to the proprietary software Splunk, which lets you get started for free, but requires a paid license once the data volume increases. This tutorial
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