[tpsreport]

For me, this was the dead giveaway that the person writing the article had no idea what he was writing about:

>Software-wise, most large porn sites will use a very-high-throughput database such as Redis to store and serve videos

No video comes out of a database. Mostly because it can't, but also because it makes no sense to make it come out of a DB.

[vidarh]

My guess is that this one came from a post a while ago where someone at Youporn wrote about how they used Redis. Obviously not for the videos - the article writer clearly didn't read that part very thoroughly, or didn't understand it.

[mrsebastian]

Redis can store binary data -- and YouPorn's Redis cluster apparently handles 300K queries per second. Those queries obviously aren't all page views (the site only peaks at 4000 PVs per second).

Why can't you store video in a database? YouPorn says that Redis is its primary data store.

[smcguinness]

Unless I'm reading this wrong, YouTube stores their videos in MySQL. http://highscalability.com/blog/2012/3/26/7-years-of-youtube...

[rplnt]

I think you are. That just means that you hit MySQL but doesn't necessarily imply that the data itself are served from MySQL. Filesystems are just fine for this task and as was already mentioned, most of the data are in the CDN anyway.