More than once, our DBAs have come to us asking how to handle discrepancies between masters' and slaves' copies of the same rows. That this is even possible say

More than once, our DBAs have come to us asking how to handle discrepancies between masters' and slaves' copies of the same rows. That this is even possible says all you need to know about how reliable MySQL's replication design is. The solution to this problem (2PC) is older than I am.