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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.
Also, have you already looked at sysdig? I don't think they're exactly tracing focused, but they've been around a long time and the times I've tried it locally it's been neat
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