Prometheus and TDengine are both prominent open-source projects in the time-series database realm, each with distinct characteristics and community dynamics. Prometheus, with 62,443 stars on GitHub, exhibits significant momentum, having garnered 430 stars in the last 30 days alone. This indicates a robust and active community, likely driven by its widespread adoption in cloud-native environments and integration with Kubernetes. Prometheus is renowned for its powerful monitoring and alerting capabilities, making it a go-to solution for observability in microservices architectures. In contrast, TDengine, with 24,795 stars, also shows considerable traction but at a different scale. It has accumulated 78 stars in the past month, reflecting steady interest. TDengine is specifically designed for Industrial IoT scenarios, emphasizing high performance and scalability. Its use cases are tailored towards industries requiring real-time data processing and analytics, such as manufacturing and smart cities. The smaller but growing community around TDengine suggests a niche focus, catering to specialized needs in the IIoT sector. Both projects have their strengths and are tailored to different use cases. Prometheus' extensive star count and recent activity highlight its broad appeal and versatility in modern monitoring solutions. TDengine, while smaller in community size, is carving out a significant niche in the IIoT space, offering specialized features that meet the unique demands of industrial applications.