We have 14 collections in 2 databases with million of documents. Some of these are real-time collections. We are creating a new database in the same server/cluster to which the above collections are to moved without any delta. I need your help to list the pros and cons of each approach and guidance to write a best mongo script to achieve in batches. This exercise should not have any
Any database downtime
Huge IO effect on the database servers
No server disruptions
How can we do that in a node js project efficiently