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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.
To step back, I'd recommend making the system as data-driven as possible, definitely would recommend not hard-coding things. You can use a library like Ncalc to design arbitrary functions. Alternatively, you could create data classes that describe different functions (something like xy + a * b) and plug in values at run time.
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