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tsv-utils
eBay's TSV Utilities: Command line tools for large, tabular data files. Filtering, statistics, sampling, joins and more.
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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.
May well be overkill for your needs, but I'm a fan of tsv-utils It's fast and enormously flexible, and seems to me a "best of breed" toolset for data mining CSV files (that is what it was written for). https://github.com/eBay/tsv-utils
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Hence, a higher number means a more popular project.