anchor.diff:                                                  KeepNodes, BucketCompletion,
                                                   NumBuckets, DeltaRecoveryBuckets),
                                     ns_bucket:set_map_opts(BucketName, MapOptions),
  +                                  ns_bucket:update_bucket_props(BucketName,
  +                                                                [{deltaRecoveryMap, undefined}]),
                                     master_activity_events:note_bucket_rebalance_ended(BucketName),
                                     verify_replication(BucketName, KeepNodes, NewMap)
                             end
  
positive.code:                                            [Bucket, {Map, Opts}]),
                            NewBucketConfig =
                                build_transitional_bucket_config(BucketConfig,
                                                                 Map, DeltaNodes),
  
                            [{Bucket, NewBucketConfig, {Map, Opts}} | Acc];
                        false ->
  
negative.code:     NewServers = DeltaNodes ++ Servers,
  
      misc:update_proplist(BucketConfig, [{map, TransitionalMap},
                                          {servers, NewServers},
                                          {deltaRecoveryMap, {TargetMap, Options}}]).
  
  get_delta_recovery_nodes(Config, Nodes) ->
      [N || N <- Nodes,
  