Redirect Player With Inventory

I want to redirect another player to a server, however when they get on I want them to have the same inventory. How can I do this?

I believe an SQL server would be the way to go. I have seen a few around different forums, the only one I can find right now is http://www.spigotmc.org/threads/playersql.18056/ , and another one which looks better from reviews though it costs 10$ is http://www.spigotmc.org/resources/invsync.514/ .

How about I just use a MySQL Server? Also, before I set all that up, is there a way to send peices of information between servers? I could do it that way.

I had a quick conversation with @Coelho about this. The main issue you will encounter will be synchronization.
Since when a player is transferred to another server they are connected to the other before the leave the one they are currently on. So you can't just save the players inventory when they disconnect since they will technically be on the other server before that event gets called.
The solution to this is to transfer them to a temporary server, save their inventory then transfer them to their destination.

As for saving the data SQL will be fine. We actually use a NoSQL database to transfer inventories on our network since it is faster and can handle more TPS.