Detail
In a cluster with no migrations happening, we can see traffic on fabric bulk channel which is mainly for migration data.What can cause this traffic on fabric_bulk apart from migrations?
Answer
If cluster has XDR configured to ship to one or more destination clusters, there are certain situations where XDR cannot ship a record and so the digest log entry is re-logged in the digest log so that the shipping can be attempted again later.This XDR re-logging will happen via fabric bulk channel and hence the traffic even when there are no migrations.