How tungsten master-master replication prevent conflicts

I heared about Tungsten Master-Master mysql replication that it handles all conflicts which we face in normal mysql master-master replication, after reading so many articles on web, my understanding with this is as-

1. It is useful for multi db but not single db.

2. In this replication we can keep one server as master for one/some db and slave for another and another server as master for another db and slave for first one.

For Example-

I have 3 servers A, B and C and have 3 DB's like DB1, DB2 and DB3.

Server A is master for DB1 and Slave for DB2 and DB3 : means only DB1 can be update on server A but DB2 and DB3 will not be.

Same way Server B is a master for DB2 and slave for DB1 & DB3.

Same way Server C is master for DB3 and Slave for DB1 & DB3.

If I am wrong till here please correct me.

Now my question is suppose Server B goes down then how DB2 will be updated.

Please help me.