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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.
Regarding your first question, you can check https://www.youtube.com/watch?v=nsv33iOnH34, which is an overview of vim-dotoo plugin, another orgmode clone that was an inspiration for my plugin. It covers basics of orgmode, and it should get you started.
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