Using HDFS Storage Locations
Vertica stores data in its native format, ROS, in storage locations. You can place storage locations on the local Linux file system or in HDFS. If you place storage locations on HDFS, you must perform additional configuration in HDFS to be able to manage them. These are in addition to the requirements in Vertica for managing storage locations and backup/restore.
If you use HDFS storage locations, the HDFS data must be available when you start Vertica. Your HDFS cluster must be operational, and the ROS files must be present. If you moved data files, or they are corrupted, or your HDFS cluster is not responsive, Vertica cannot start.