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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.
Try RavenDB (NoSQL like gandi800 or skilriki suggested). Has no connection whatsoever with the US and has ETL. You can download it on-prem for free: RavenDB
NOTE:
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