Beanstalkd was created by a company that ran an early third-party Facebook app (Causes), not Facebook itself. Facebook used their in-house "async" system, desc

Beanstalkd was created by a company that ran an early third-party Facebook app (Causes), not Facebook itself. Facebook used their in-house "async" system, described in the post, for many years. Prior to that (over a decade ago) I believe they used Gearman for some things, but I'm not certain, might be misremembering. I don't know if they ever used beanstalkd early on.