GP HD modules are configured with Greenplum’s Hadoop distribution and ready for high-performance unstructured data queries. There are three types of Hadoop modules: Masters, Workers and HBase.
Hadoop Master modules run namenode, secondary namenode, and jobtracker services. Hadoop Worker modules run tasktracker and datanode services. Hadoop HBase modules run the HBase distributed database service.
Hadoop server specifications are the same as a capacity GPDB or DIA module.