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Walmart says it doesn’t want its data on Amazon’s services.

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Walmart has issued a warning to tech companies it does business with: don’t use Amazon‘s cloud services.

Amazon has quickly emerged as the dominant player in cloud-based storage and computing power with its Amazon Web Services program.

Now, Walmart is turning up the heat as it aggressively invests in e-commerce.

The retailer is starting to tell technology companies it works with to stop using Amazon Web Services and move to competitors instead, The Wall Street Journal reported.

Amazon Web Services, known in the industry as AWS, is the dominant business for hosting websites and services,…