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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.
There's plenty of projects or there that allow this. Resolve Collaboration was one of them. The idea still applies: Host a PostgreSQL database in one duschen and connect to it via a VPN (Tailscale, Wireguard, etc.). Make sure to also run a scheduled backup on the DB.
NOTE:
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Hence, a higher number means a more popular project.