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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'm not an expert on the industry standards, but why do you have to store the conversion unit? Can't you just use a library like https://github.com/olbrich/ruby-units to do the conversions?
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