[wolco]

The fix is probably 10 minutes but the deployment process, intake process and notification process took 3 1/2 hours

[neotek]

Is there an article or blog post somewhere about what Facebook's deployment process is like? It must be a massive operation.

[chromelyke]

https://code.facebook.com/posts/270314900139291/rapid-releas...

[orastor]

They also use bittorrent:

https://arstechnica.com/information-technology/2012/04/exclu...

[styfle]

What about code review process? Surely someone else verified the fix before deployment.

[ampersandy]

FB uses Phabricator, which was spun out into an open-source project:

https://www.phacility.com/phabricator/