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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 use this with mu4e to read Gmail via IMAP. Here's a couple of examples which I used in my config, with some mbsync settings as well: https://github.com/danielfleischer/mu4easy http://liwen.name/mu4e.html
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