Anthony from enterprise experience working with rsync there is extremely limited resilience of rsync working with huge data.
Always an issue of instability, running continuous work on huge capacity of data.there are no universal recipes for all servers and all data types & i know rsyncing about 4 petabytes is not anywhere near a wise thing using standard rsync.
as the data grows the absence of trustworthiness (dependability, security, performability) and tolerance (survivability, disruption tolerance, and traffic tolerance) is clearly visible. rsync is generally good for hobbies but when it comes to enterprise computing you need more than just the standard rsync. I stand to be corrected & i am yet to hear success of rsync running at least 1PT work load with out issues.