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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've been self hosting SnappyMail for the last few months after giving up on gmail. It's not perfect, but it's been pretty good... if I ever get any free time, I will probably try to start contributing to the project.
NOTE:
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