Back Up a Sharded Cluster with Database Dumps
Note
mongodump
and mongorestore
cannot be part of a backup strategy for 4.2+ sharded clusters
that have sharded transactions in progress, as backups created with
mongodump
do not maintain the atomicity guarantees
of transactions across shards.
For 4.2+ sharded clusters with in-progress sharded transactions, use one of the following coordinated backup and restore processes which do maintain the atomicity guarantees of transactions across shards: