I've got a mongo cluster with three nodes, running 2.6, but probably going to 3.2
What is the best method to back-up a database in a replica set of three mongodb servers?
mongodump --db [dbname] --out [path]?
And do I back-up from the primary node, or the slaves? The database is About 30gigabytes, Will the performance decrease?
I looked at the documentation here; https://docs.mongodb.com/manual/reference/program/mongodump/ and https://docs.mongodb.com/v3.2/tutorial/backup-sharded-cluster-with-database-dumps/
But could not find my answer.