*Maintaining some form of coherency throughout all N nodes is hard.* Hence the "... | Hacker News

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		gaius on Oct 13, 2009 \| parent \| context \| favorite \| on: Why are Facebook, Digg and Twitter So Hard To Scal... Maintaining some form of coherency throughout all N nodes is hard. Hence the "eventually consistent" model.

scott_s on Oct 13, 2009 [–]

That's still hard. There's a trade-off between accuracy and performance.

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