In which scenario would local replication be unnecessary?

Local replication is primarily designed to ensure that data is not only preserved but also available for recovery in case of failure or corruption. In the scenario where the same data is stored elsewhere, local replication becomes unnecessary because there already exists a redundancy in that data. The purpose of local replication is to create additional copies and enhance data availability, so if the data is already being replicated or stored in another location, further replication on the local server does not add value.

In contexts where data redundancy is critical, local replication is essential as it creates immediate backup copies. Similarly, when dealing with volatile data, local replication serves to capture changes that may occur frequently. High availability requirements also necessitate that data be readily accessible and backed up. However, if the same data exists in multiple other locations, then those implementations are sufficient to meet the needs for redundancy and availability, thus making local replication superfluous.