These components are installed and managed independently from WarehousePG, and aren't activated with CREATE EXTENSION.

• WarehousePG Platform Extension Framework (PXF) - Provides connectors for accessing data stored in external sources such as object storage and Hadoop.
• whpg-backup - Provides parallel backup and restore for WarehousePG clusters.
• whpg-backup-s3-plugin - Adds Amazon S3 support to whpg-backup.