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enkiTS
A permissively licensed C and C++ Task Scheduler for creating parallel programs. Requires C++11 support.
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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.
Rather than a new background thread I would use a task/job system such as my own open source enki Task Scheduler (enkiTS).
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