dataviewmapping dataReductionAlgorithm not increasing number of rows inputted

Hi,

the dataReductionAlgorithm-setting should be applied to the rows object, not to the whole table (see https://docs.microsoft.com/de-de/power-bi/developer/visuals/dataview-mappings#data-reduction-algorithm-usage, there is also an example for tables at the bottom). Try moving it inside the rows object:

"dataViewMappings": [
    {
      "table": {
        "rows": {
          "select": [
            ....
          ],
          "dataReductionAlgorithm": {
            "top": {
              "count": 30000
            }
          }
        }
      }
    }
  ]

Best regards,

Robert