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hydra
Hydra: Column-oriented Postgres. Add scalable analytics to your project in minutes. (by hydradatabase)
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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.
It doesn't look fast compared to others in ClickBench: https://benchmark.clickhouse.com/#eyJzeXN0ZW0iOnsiQXRoZW5hIC...
And just like last time, watch out for the misleading GitHub license detector because it's not entirely Apache as the GitHub summary claims but rather *some* is Apache and buried in the interior is some AGPL stuff: https://github.com/hydradatabase/hydra#license
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.