See definition below.
Also, you can turn off the creation of stubs in the cache (it will still be used as a temp location to open a recovered stub) by setting the registry key (also listed below). If this key is set to no the restubbing feature will not be available.
GXHSMCACHE cache Folder
For Local File Systems and Celerra instances, a hidden folder (GXHSMCACHE) is created on each volume you are monitoring for stub recovery. The purpose of this folder is to provide a temporary location to open a recovered stub file. When the stub recovery is completed, the file will be deleted from the hidden folder.
Description: Maintain stubs in cache location for quick re-migration of stubs