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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.
The implementation is quite interesting. You can see it here. The serialization step has two parts: it takes the traceback object and wraps it into a new object so it can be serialized; secondly, it stores the source code so you can debug even if you don't have access to the source code!
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