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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.
If you stick with SQLite, you could try creating your own sequencer. Funnel all your writes into one thread on one process, and have that thread do the writing. That way there is only ever one possible writer on the DB at a time. Here is an example what I did when I built a tool to import comments from pushshift into SQLite. When I do this on an NVME drive and I am CPU bound on decompression and JSON parsing, so the DB isn't even a bottleneck.
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