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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You could have a look at https://github.com/hitobito/hitobito for some features. Not sure if the community language is English or German, but nay be worth asking directly
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