openGemini

What openGemini is

openGemini is a free, open-source distributed database for storing and analyzing time-series data such as metrics, logs, and traces. The project positions it for monitoring and observability, IoT, and operations data analysis. Its MPP design uses ts-sql, ts-meta, and ts-store components that can scale independently. Column-based storage, compression, automatic partitioning, and LSM-based techniques form part of its storage approach. A built-in AI data analysis platform provides real-time anomaly detection. openGemini supports SQL and the query languages InfluxQL, PromQL, and GeminiQL, with HTTP APIs for expression and metadata queries and remote reads and writes. Ingestion options include InfluxDB Line Protocol, Apache Arrow Flight, and Prometheus remote_write. It supports Linux, macOS, and Windows, as well as Docker and Kubernetes deployment. Authentication is disabled by default and must be enabled in configuration. The project reports 90% overall PromQL function and operator support, with some functions and operators unsupported; its backup guide describes an interface but no CLI backup command.