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> I dealt a lot with large scale large data sets and I wouldn't recommend mysql for that at all

Was your use-case transaction processing (OLTP) or analytics (OLAP)? There are a ton of examples of massive-scale MySQL deployments for OLTP... Facebook, YouTube, Pinterest, Slack, Uber, Wikipedia, GitHub, Yelp, Etsy, Shopify, Booking.com, Wordpress.com, Tumblr, Box, Dropbox, Alibaba, Square, Venmo... a large chunk of the internet, in other words :)

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It seems most people on HN (and to their credit, they also admit), they have limited recent experience with MySQL, so they don't know that they are 99% functionally equivalent (with edge cases being better for one or the other).

analytics mysql was horrible for that, eventually bogging down to the point it was breaking the system down. Storing was ok. Analyzing emphatically was not.

And no amount of testimonies will counter that MySQL has a lot of fundamentally broken assumptions when it comes to data structure and relations. I mean it works if you don't mind handling that at higher levels, and sometimes that's a good call. And sometimes it's not.

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