The JAI-EXT library is open-source project which aims to replace closed source JAI project provided by Sun. The main difference between JAI and JAI-EXT operations is the support for external Region of Interests (ROI) and image NoData in JAI-EXT.

If you are using the Ubuntu or Red Hat packages, or the Virtual machine, JAI-EXT operations will be enabled by default, and can be controlled from Image Processing page:


JAI/JAIEXT Setup panel

If you are using the Boundless Suite application server (WAR) bundle, JAI-EXT operations will be disabled. Refer to the GeoServer documentation for instructions on how to enable JAI-EXT.