We’ve been using a 3-node PSA replicaset config as the mongosync source without noticing any issues. However, I recently noticed this statement in the mongosync FAQ:
The source replica set must have more than 2 non-arbiter nodes and you must sync from a non-arbiter node.
Is this saying that there needs to be 3+ non-arbiter nodes in the setup in order to use it as a mongosync source? Is this still a requirement in the latest versions of mongosync or does it possibly work with just one primary and one secondary (and an arbiter)?