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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.
Note that OARS is at risk of being abandoned¹ because people threatened to get the developer banned from GitHub² for giving app developers the ability to tag their app as having homosexual content (because said content is illegal in some countries.)
¹:https://github.com/hughsie/oars/issues/41#issuecomment-81214...
NOTE:
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Hence, a higher number means a more popular project.