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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.
I've never tried it out but openseedbox looks promising. I'm kinda surprised there aren't more options. I know deluge supports multiple users but I don't think the users actually do anything.
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Hence, a higher number means a more popular project.