Hey @dogs_Cute , thanks a lot for answering.
So I assume the breakdown is:
- stop the mongod service on a slave node
- copy the files to the “to-be” replica node’s data directory
- start the original node backup up (and it should begin catching up)
- start the new node up and add it to the replicaSet.
I assume that as long as the OpLog is fresh enough it should be able to catch up as well.
Did I get that right ?
Thanks,