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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 is a mainstream thing. It's enabled by default on every Windows install, as far as I know, although you may not be impressed by its understanding of what your frequently opened programs are. It's been about ten years since I ran Windows, but I used to have a batch script to read everything in a directory so that it would be in the disk cache and subsequent accesses would come from RAM. The Linux equivalent of my script is vmtouch, although that's a lot more full-featured.
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