Facebook has its own logging system - http://en.wikipedia.org/wiki/Scribe_(log_server) http://en.wikipedia.org/wiki/Scribe_(log_server) - which they probably us

Facebook has its own logging system - http://en.wikipedia.org/wiki/Scribe_(log_server) http://en.wikipedia.org/wiki/Scribe_(log_server) - which they probably use for in-house systems. I would guess that the library in question might be used when they run third-party applications.