Second question today: How can intest HDFS in Hadoop?

Do you mean ingest HDFS metadata into DataHub? The DataHub has a metadata modeling that is fixed but applies to many use cases. As I don't believe there is an ingestion already implemented by the community, you can implement your own. I'll give you the documentation links here. You can see the available sources here and a detailed introduction to the ingestion process: https://datahubproject.io/docs/metadata-ingestion You can use the DataHub SDK to implement your own Metadata Emitters: https://datahubproject.io/docs/metadata-ingestion#using-as-a-library-sdk You can even implement your custom source and your own recipe config: https://datahubproject.io/docs/how/add-custom-ingestion-source