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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.
If you're interested in an ActivityPub that works like that, I work on one called FedBOX[1]. It doesn't have clients at the moment, but that's how I planned to have it used.
https://github.com/go-ap/fedbox
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