Facebook Servers ????

[Shizz]

How do Facebook servers deal with the vast amount of information they hold as well as the 800million daily users, and how do people working there fix severs if they crash or are hacked ??

[Jan]

Their servers work with very intelligent code, performant database clusters and high-end equipment. They also have some of the best programmers that write the code in a very efficient way.

If their servers crash, a tech goes by and fixes it. They have so many servers that are clustered, full redundancy (to the n-th level) so if a server dies, or several servers die, the user won't notice a thing.

When it comes to the hacking part of your question, you can write a book about it, but basically, they have a lot of people working on security and checking everything out 24/7. If a hacker does get through, they'll shut down their access immediately and try to restore as much and as fast as possible... but usually they're blocked even before their attempts to get access succeed.