In the _cluster app on the cluster manager there is an indexes.conf file that specifically sets repFactor to 0 for the _introspection, _telemetry, _metrics, and _metrics_rollup indexes. Is there a reason these indexes should not be replicated? Thanks.
It's not that those indexes *should* not be replicated, it's that it's not a big deal if data is lost from them so you can save storage by not replicating them. If you have a low risk tolerance then feel free to set repFactor = auto for those indexes (it won't hurt anything).