How to organize backup mongodb with minimal downtime?

Question

MongoDB

new to mongo. I have a sharded mongodb cluster. Is it possible to perform its backup with minimal (preferably zero downtime). The official documentation speaks of at least the obligatory stop of writing to the cluster.
As an option, I'm interested in the ability to create a separate single slave for the entire cluster, so that it can be suspended for dumping. Is it possible to implement such a path?

Answer 1

Was looking for a similar solution. The most optimal - I decided to use replication, complete freedom of action and fault tolerance.