def compress(self):
        """
        Compress the new exported image,
        Block size was taken from virt-builder page
        """
        if not self.do_compress:
            return
        with LogTask('Compressing disk'):
            utils.compress(self.dst, 16777216)
            os.unlink(self.dst)
Compress the new exported image,
        Block size was taken from virt-builder page