openGemini vs UnitDB
openGemini
opengemini.orgUnitDB
github.comSide by side
| Figure | openGemini | UnitDB |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 0 |
| Spec score · Time-Series Databases | 8.5 (#8) | 6.9 (#34) |
| Purpose | openGemini is an open-source, cloud-native distributed time-series database for storing and analyzing large volumes of time-series data. | UnitDB is described as a specialized time-series database for microservices, IoT, and real-time internet-connected devices. |
| Storage | It uses column-based storage and describes data compression, automatic partitioning, and LSM-based storage techniques. | The engine supports larger-than-memory data sets, fast lookups and writes, TTLs on message entries, and immutable database opening. |
Plans
In their own words
openGemini
openGemini is a free, open-source distributed database for storing and analyzing time-series data, including metrics, logs, and traces. Its stated application areas include monitoring and observability, IoT, and operations analysis. The system uses an MPP architecture with ts-sql, ts-meta, and ts-store components that can be scaled independently. Column-based storage, compression, automatic partitioning, and LSM-based techniques are part of its storage design. A built-in AI analysis platform provides real-time anomaly detection. Query options include InfluxQL, PromQL, and GeminiQL; ingestion methods include InfluxDB Line Protocol, Apache Arrow Flight, and Prometheus remote_write. It also provides HTTP APIs for expression and metadata queries and remote reads and writes. Deployment is supported on Linux, macOS, and Windows, as well as through Docker and Kubernetes. Authentication is disabled by default and must be enabled in configuration. PromQL compatibility covers 90% of Prometheus functions and operators, with some unsupported.