I read the release and announcement for ClusterSync, and the tool sounds brilliant, huge possibilities.
I have not been able to test this yet but 2 initial questions:
Does the target need the same replicasetname, and or does the meta data / users and roles get copied over as part of the sync?
I read that various index changes only get applied at the “finalize” stage. I can see potential for using this tool to maintain a safe walled replica of a production rate particularly if users/roles are not synced, but if the ttl indexes never apply I can see that being an issue with keeping the sync running for an extended period. Interested if this use case was considered.
Regardless, sounds like a brilliant addition from Percona.