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0 pointsUehreka2y ago0 comments

> Code at Google3 is one giant monolith

I’ve heard this stated before, and something about it feels off. There’s no way all of Google’s code is in one repo.

Like, does that monorepo contain the full Android operating system with Google Services and the firmware for all the Pixel devices? I feel pretty sure multiple teams at Google must have forks of the Linux kernel for one reason or another, would those be in there too? Is Chromium in there too? What about the whole golang project?

Even if I’m off about some of this, it feels like the statement “Code at Google is one giant monolith” needs some qualifiers.

0 comments

morgante2y ago

There are certainly a few notable exceptions (Chrome and Android), but google3 really is a massive monorepo.

It does contain forks of tons of open source code in the third party folder. I don't recall if the Linux kernel is in /third_party but I would not be surprisied if it is.

A fair amount of the operations are actually documented publicly, ex. https://opensource.google/documentation/reference/thirdparty...

summerlight2y ago

Note that google3 is a subset of the entire Google codebase. But it still contain more than half of its code (>2B LoC), mostly those running over their cloud. In contains all the infrastructure code as well, including Linux kernel, compiler, tool chain... literally everything needed. When you build some big binaries, you may see more than 500k~1M build targets analyzed and built (or pulled from cache).

rightbyte2y ago

Ye, like, is there a google.exe at 3912GB with 10k command line options like '--search-server --port=80' or '--Gsolitaire'?

why_only_152y ago

no, there are thousands of Blaze build files that each have their own binaries, tests, libraries, etc.

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dilyevsky2y ago

Android, golang, chromium and a few others were separate but there were 2B+ loc of other stuff in that repository

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