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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.
[1]https://reactphp.org [2]https://www.php.net/parallel [3]https://github.com/amphp/ext-fiber [4]https://wiki.php.net/rfc/fibers
For Swoole, you use https://www.swoole.co.uk/docs/modules/swoole-async-mysql-client and for ReactPHP, you'd use https://github.com/friends-of-reactphp/mysql.
NOTE:
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Hence, a higher number means a more popular project.