p7zip lzma comprensión máxima ultra. FROM: https://www.ibm.com/developerworks/community/blogs/6e6f6d1b-95c3-46df-8a26-b7efd8ee4b57/entry/how_to_use_7zip_on_linux_command_line144?lang=en
7z a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on file.7z folder1