|--cache||dir||Define a directory for a SZS cache.If creating a YAZ0 compressed file with standard compressen (level 9), the cache is searched for the compressed version. File cache-content.txt is used as file list with hash values. If the cache file is not found or the content differ, the file is (re-)created and exit status 2=differ is returned.
Background: Loading a compressed SZS and content verification is much faster than YAZ compression.
For legay reasons: If parameter DIR is a file, it is split into dirname and basename. The dirname is used for the cache directory and the basename for option --cname, but only if --cname is not used.
|--purge||Remove repeated files with same checksum.|