User wants perfect 'Round Robin' load distribution

This is one of the typical insistent requests one receives on the job. It is hard to make people understand that LB is not an exact business. In most cases, I just have to give up explaining, and try to make things appear what people want. And round-robin won't achieve that, for if a pool member drops out for a period and rejoins the pool later, it will probably not catch up with the rest of the pool members in terms of the number of connections for a long time.