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Keeping Your Megasite Ticking: Q&A With Facebook Engineer Robert Johnson


Since it arrived in 2004, Facebook has faced its share of unwelcome stories in the media, and it seems that security and privacy issues are a repeating theme. But when was the last time you heard about Facebook’s site crashing? With more than 500 million active users worldwide, half of whom log in daily, Facebook chalks up some impressive statistics. It has a cache with 2 trillion objects in it, which it access 100 million times a second. Facebook processes 4 trillion feed actions every day. It stores 100 billion photo files.

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