Define the term “Search factor” and “Replication factor”

The search factor (SF) determines the number of searchable copies of the data/bucket that an indexer cluster may keep. The search factor value of 3 indicates that the cluster can keep up to three copies of each bucket.
The replication factor (RF) specifies the maximum number of users that can receive copies of your data/buckets. The search factor, on the other hand, should not be larger than the replication factor.