They've proudly blogged about it a few times http://blog.stackoverflow.com/categ... | Hacker News

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		latch on Feb 7, 2012 \| parent \| context \| favorite \| on: Stack Overflow running short on space They've proudly blogged about it a few times http://blog.stackoverflow.com/category/server/ I think they've successfully shown how far you can take it. Nevertheless, I agree with you that scaling this horizontally makes a lot of sense.

wavetossed on Feb 7, 2012 [–]

They ARE scaling horizontally. Remember where they mentioned that they are putting StackOverflow, one of several sites that they run, on its own box? That is horizontal scaling. They now have two shards, one with SO and one with all the other sites.

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