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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.
https://github.com/barrycarter/bcapps/tree/master/bc-getmail.pl checks all my email accounts in a neverending loop, handling cases where getmail gets stuck
It's pretty crap but it seems to work.
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