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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.
It seems there's something of an update to the project status here: https://github.com/sixthnormal/clj-3df/issues/46 It's not actively maintained though there seems to be work on a successor product.
I've always followed this project but could never quite get the differential dataflow server running that it requires: https://github.com/TimelyDataflow/differential-dataflow (though I probably didn't try hard enough).
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