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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.
I've actually did a basic implementation for Literal types in PHP src: https://github.com/BogdanUngureanu/php-src/commit/37413543fafb300468d83ed8fcc72dc859c577cb
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