Namespace Realization
Namespace refers to the directory structure which contains replicated data. Replicated data is always transferred separately from namespace data (although some small file data is transferred along with the namespace).
Namespace realization refers to the process in which the replicated directory structure (the namespace) appears on the replication target.
Because file data and namespace data is transferred separately, in some situations it might take longer for replicated data to complete transferring than for the namespace realization to complete. This is especially likely to happen if there is a backlog of file data waiting to be transferred at the time when namespace is either scheduled to run or is manually initiated.