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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.
the company is very chinese, and although the OS is open source, available on GitHub etc..., China has a bit of a history of tracking people and collecting their data ("But Huawei something something" yes, yes, I know, but this is not the point of the post)
NOTE:
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Hence, a higher number means a more popular project.