DevOps Dictionary

OpenSearch is an open source search and analytics engine used to index, query, and analyze large volumes of data in near real time. It addresses the problem of finding relevant information quickly across logs, application events, metrics, and documents by converting incoming data into an indexed structure optimized for fast lookups and aggregations (summary calculations over many records). At a high level, data is ingested, mapped into fields, stored across distributed nodes, and queried through APIs that return matching documents and computed insights.

With OpenSearch, teams can troubleshoot incidents, explore trends, and build dashboards quickly; without it, the same work often falls back to slow database queries, manual log grepping, or fragmented tools that increase time to resolution and operational risk. This gap exists because indexing shifts cost to ingest time, enabling low-latency queries even as datasets grow.