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I may be old guy but I never get it. Why do I ever need all this virtualization stuff? I just buy a server, install CentOS, install postgresql, create another user, install java, download&unarchive tomcat and write some simple bash scripts. Voila. Everything works, everything is protected, performance is superb and I can do all that within one day. Good enough to serve few thousand requests per second. May be not enough for Facebook, of course.


That's great if it's just you and you don't care about your site breaking because you didn't test your code outside of your Mac.

More users, more developers, larger sites require more than just Jim Bob installing CentOS and tomcat on a pizza box.

It doesn't always require Docker + this tech or that tech, but you will have to put some automation in place.


And then that data center has a fire, your server is gone, your data is gone, your business loses X thousands of dollars per day, all because everything was on one server.


If you have continuous backups, it's actually not that bad. You can recreate a server fairly rapidly from a full system backup.


I usually have backups to a cloud, so thats's really not a problem.


Yeah, but it still takes time to set up a new server, launch it, update the DNS. And you lose all the data since the last backup.




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