Go ahead and take a wild guess as to how many lines of code make up the entirety of Google’s services. We’re talking everything here — search, Gmail, YouTube, Google Docs etc. Now you might want to aim high because there’s a good chance that even your best guess will come in far below the actual figure — a whopping 2 billion lines of code.
Now how about taking a stab at how large Google’s entire codebase is? How bout trying 86 terabytes on for size.
These interesting tidbits come courtesy of Google engineering manager Rachel Potvin who disclosed it at the @Scale engineering conference earlier this week. Not surprisingly, the topic of Potvin’s talk centered on the benefits and challenges associated with storing and managing a gargantuan codebase. And ensuring that everything remains safe, Google’s mammoth code repository is stored and updated at 10 Google data centers located across the globe.
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