Youtube Architecture

Platform

1. Apache
2. Python
3. Linux (SuSe)
4. MySQL
5. psyco, a dynamic python->C compiler
6. lighttpd for video instead of Apache

What's Inside?

The Stats

1. Supports the delivery of over 100 million videos per day.
2. Founded 2/2005
3. 3/2006 30 million video views/day
4. 7/2006 100 million video views/day
5. 2 sysadmins, 2 scalability software architects
6. 2 feature developers, 2 network engineers, 1 DBA

Recipe For Handling Rapid Growth

while (true)
{
identify_and_fix_bottlenecks();
drink();
sleep();
notice_new_bottleneck();
}

This loop runs many times a day.

Reference : 

http://highscalability.com/youtube-architecture