system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are ThePirateBay mirrors decentralised when they all contain the same torrents and comments?
gpt
Basically the same way Google and any other "big" Internet site does it: Replication of new entries in the database. When a new entry is added it takes a few moments (or maybe minutes) for it to get synched over all systems out there.

What makes the "huge" players like Google different is, that they managed to scale up the process by several orders of magnitude.