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How does stackoverflow calculate the number of views in a question?

and how to prevent duplicates visit form same IP without storing huge data in mysql?

marked as duplicate by Thomas Bonini, waiwai933, Yi Jiang, ChrisF, Pops Feb 28 '11 at 15:15

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migrated from stackoverflow.com Feb 26 '11 at 18:40

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May be you should look at following link :

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