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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.
that said, you can achieve what you're asking but it's tricky: https://github.com/mastodon/documentation/blob/archive/Running-Mastodon/Serving_a_different_domain.md
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