A customer has heavy bandwidth traffic on their WAN link that they have isolated to HP 3PAR StoreServ Remote Copy replication between their primary and DR site. They are not concerned with the RTO…

Using synchronous long distance mode or synchronous mode replication would increase, not decrease, WAN traffic, as every write operation must be acknowledged by the remote site before the primary host receives confirmation.

Synchronous mode replication sends every write operation to the secondary site before acknowledging it to the primary host, which inherently generates significant WAN traffic and latency, contradicting the goal of decreasing WAN link traffic.

Creating more Remote Copy volume groups might reorganize data but does not inherently reduce the total volume of data replicated or the frequency of updates, thus it will not decrease overall WAN link traffic.

Replicating only database logs (transaction logs) significantly reduces the amount of data transferred over the WAN compared to replicating entire databases, thus decreasing WAN link traffic while allowing for frequent updates to improve the Recovery Point Objective (RPO).