I am using Robomongo in my local machine. Robomongo is using wired tiger storage engine to store my dbs. Now when I want to copy my database to a remote machine I am using :
db.copyDatabase("localDBName","remoteDBName","localMachineAddress")
The wired tiger storage engine is creating an unknown .wt format because of which the above command is not able to copy the database.
On copying empty database is getting created at the remote machine.