Why does transfer speed slow down by enabling replication?

When replication is configured, updated data is transferred to replication targets after writing (Create/Update/Delete) at the replication source, therefore, transfer speed gets slower due to high load on products comparing to the condition without setting replication.

Transfer speed especially gets slow at the following occasions.

• Updated data in the shared folder which is set as replication source at the same time.
• Write many files to replication source for long time.
• Write data by AFP from Mac OS.

When several replications are set to one replication source, transfer speed gets slow because several transfers are performed against a single writing.