We have Sharded Mongo Cluster. However some documents are sharded and others are unsharded.
We are planning to migrate these databases to new cluster. Please update if there is any process or steps to migrate the data from one sharded cluster to the other.
We have two secondaries and 1 primary for each shard,MongoS,3 Config Servers,2 Arbitors. I understood that copydb can not be used on the sharded collection. Please suggest if there is any other way.