openGemini is a free, open-source time-series database that encourages community contribution and cooperation. openGemini supports SQL, it is compatible with InfluxDB APIs and Prometheus remote read/write APIs. openGemini provides single-node and distributed clusters. It is easy to install, deploy, and maintain without any external dependencies. openGemini features high performance, low latency, low storage costs, and flexible scalability. It can manage hundreds of millions of timelines accurate to nanoseconds and supports complex data queries and analysis during O&M and monitoring, helping you store huge volumes of data and handle high read/write throughput in industrial IoT sectors.