The Do not compress files ending with list specifies a list of file extensions. During a backup, NetBackup does not compress files with these extensions because the file may already be in a compressed format.

Do not use wildcards to specify these extensions. For example, .A1 is allowed, but not .A* or .A[1-9]

Files that are already compressed become slightly larger if compressed again. If compressed files with a unique file extension already exist on a UNIX client, exclude it from compression by adding it to this list.