Generally, Denodo Distributed File System Custom Wrapper allows access for Delimited files and Non-Standard files stored in HDFS and AWS S3 such as Avro, Map files, Sequence files, Parquet files. Further, it contains a custom wrapper to retrieve file listing information from the distributed file system and display it in a relational way.
If you are a valid support user, then, you could download this custom wrapper from Downloads > [Denodo Connects](https://support.denodo.com/resources/denodo-connect/list/Denodo%208.0) section of the Support Site.
For more information, you could refer to the [Denodo Distributed File System Custom Wrapper - User Manual](https://community.denodo.com/docs/html/document/denodoconnects/8.0/en/Denodo%20Distributed%20File%20System%20Custom%20Wrapper%20-%20User%20Manual).
Hope this helps!