Communication between North America and China is terrible sometimes. Brazil is even worse !
Local systems' replication is not a sure thing as well, normally they are overnight tasks, N times per day type of replication ( bi-direction, one-direction ) sometimes causes suspicious duplicate records because processes sometimes get shattered.
The effectiveness of replication also depends on how application is designed and developed. We once have one application designed in a way of removing-all and then re-writing-all documents, which is a simple logic to refresh data for sure, but is a devastating scenario for administrator to manage replication !
Local systems' replication is not a sure thing as well, normally they are overnight tasks, N times per day type of replication ( bi-direction, one-direction ) sometimes causes suspicious duplicate records because processes sometimes get shattered.
The effectiveness of replication also depends on how application is designed and developed. We once have one application designed in a way of removing-all and then re-writing-all documents, which is a simple logic to refresh data for sure, but is a devastating scenario for administrator to manage replication !