How does youtube data centre work

[thirdworldking]

so yeah basically how does a youtube data center work like what raid levels does it use how many different hdd is one video stored on stuff like that how does it all work to stream seamlessly too so many people at once?

 

thanks in advance

[Samdb]

It has 45,000 servers, all filled with drives. And they have an enterprise connection.

[CAKEwasTRUE]

It has 45,000 servers, all filled with drives. And they have an enterprise connection.

For Add's

 

 

For videos they are using a 468 systems and 10mbps connection!

[robobeat]

check this out:

 

http://www.google.com/about/datacenters/

 

should tell you a whole lot.

[rufee]

Complex stuff in there. Basically when you upload a video it propogates to all the google datacenters so that it can be accessed closest to you.

As far as hardware goes looks like they are running their own custom OS and each machine has a ton of ram (from what i gathered), for storage its some kind of cloud based system that is not exactly what you would call RAID, because when you are this big RAID is not practical to do. My take on this is that each node (server) has lets say your video and some other ones on it and so does 50 other nodes in the same datacenter and there is a database that knows on which node your video is stored so when you access it the system selects the node that has the least load and gives you the video, so if a node fails all new traffic gets rerouted to another node thus not losing any data or uptime and when replaced the new node gets populated with data automatically at runtime without the need to rebuild a RAID array which would take time. Well thats my take on how it works.

 

And the video by google explains a lot so watch that.

[Guest]

YouTube is a Google service and therefore uses a CDN or content delivery network. All of the content on YouTube is stored in Google data centres across the US. Google then has servers right across the world where content is cached almost to the point of having duplicated copies of everything on YouTube stored in thousands of locations across the world. This means that instead of watching a video in South Africa that would be typically stored on a server in the US, you're watching a cached copy on a server in South Africa. 

 

Let me know if you wish to know more.