Latest Elasticsearch Articles

Many applications begin with search implemented directly in a relational database. A query such as WHERE title LIKE '%database%' is easy to build, requires no additional infrastructure, and may work perfectly well for a small dataset.

Search looks simple from the outside: enter a query and receive a list of relevant results. Behind that interface is a specialized data-processing system designed to find useful documents across millions or billions of records within milliseconds.

Elasticsearch can scale from a small single-node deployment to clusters serving billions of documents, but horizontal scaling is not automatic. Adding nodes without understanding shard layout, workload distribution, recovery behavior, and memory pressure can make a cluster more complex without makin