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Bottlenecked by the effort of collecting data and the cost of storing it on tiny 20th century hard drives, last century’s datasets tended to be small. It was hard to scrape together enough data for even a single respectable dataset, which meant that data-splitting was rarely an option. This forced professionals into a choice between two dramatically different mindsets.

Source : https://towardsdatascience.com/can-analysts-and-statisticians-get-along-5c9a65c8d056

What does "scrape" mean in this context? There are many definition of it.

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    It's a metaphorical usage; the image is of someone gathering together a small quantity of, for example, grain by scraping the ground or the bottom of a container. There wasn't much data and it was collected with difficulty. Commented Jan 25, 2020 at 17:50

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Data scraping is a technique in which a computer program extracts data from human-readable output coming from another program

Wiki

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The verb is scrape together:

scrape together or scrape up
vb
  (tr, adverb) to collect with difficulty: to scrape together money for a new car.

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