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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.
At most larger companies were I worked they provided a Repo which was maintained by a dedicated (small) team. However the responsibility was at the devops teams themselves, we just considered as a open source project, so if you want to add or fix things you could create a Pull request. Actual the last company I worked for made their project real open source: https://github.com/AzDocs/AzDocs
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Hence, a higher number means a more popular project.