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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.
We did a bunch of benchmarking around this when writing nbdcopy (https://gitlab.com/nbdkit/libnbd/-/tree/master/copy) which can copy file to file as well as between local files and NBD servers. There was also the goal to avoid polluting the page cache, which depending on if you're going to use the file content immediately afterwards or not matters.
Anyway long story short, the best thing we found (for Linux) was Linus's own advice linked from here: https://stackoverflow.com/a/3756466
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