Hi,
We have a ReplicaSet with 3 members in our production environment and two stand alone for test and pre-production environments with 2.6 version installed.
We'll going to migrate our mongoDB this environments to 3.2 (current version).
We need some documentation or information for to do this change safely and securely.
We see some diferences in the security schema and obiously in the storage with WireTiger. We need to pay atention from some aspect, or we only need to do a backup, and restore in the new servers.

Thanks!