1. A method for determining completion of a data migration that results from a distributed agreement protocol (DAP) change within a distributed storage network (DSN) that includes a plurality of storage pools, wherein a storage pool of the plurality of storage pools includes a plurality of storage units, the method comprises: in accordance with the DAP change, transferring, by a storage unit of the plurality of storage units, encoded data slices to one or more other storage units within the DSN; while transferring the encoded data slices, maintaining, by the storage unit, a storage unit migration tracking repository that tracks migration of the encoded data slices; maintaining, by a storage pool monitoring module affiliated with the storage pool, a storage pool migration tracking repository based on the storage unit migration tracking repositories of the plurality of storage units, wherein the storage pool migration tracking repository tracks migration of a group of encoded data slices by the plurality of storage units; maintaining, by a DSN monitoring module affiliated with the DSN, a DSN migration tracking repository based on the storage pool migration tracking repositories of the plurality of storage pools, wherein the DSN migration tracking repository tracks migration of a plurality of groups of encoded data slices by pluralities of storage units of the plurality of storage pools; and indicating, by the DSN monitoring module, completion of the data migration as a result of the DAP change based on information within the DSN tracking repository.