code: def store_atlas_zonefile_data(zonefile_data, zonefile_dir, fsync=True):
      
      if not os.path.exists(zonefile_dir):
          os.makedirs(zonefile_dir, 0700 )
  
      zonefile_hash = get_zonefile_data_hash( zonefile_data )
      
      # only store to the latest supported directory
      zonefile_path = atlas_zonefile_path( zonefile_dir, zonefile_hash )
      zonefile_dir_path = os.path.dirname(zonefile_path)
  
      if os.path.exists(zonefile_path):
          # already exists 
          return True
  
      if not os.path.exists(zonefile_dir_path):
          os.makedirs(zonefile_dir_path)
  
      try:
          with open( zonefile_path, "wb" ) as f:
              f.write(zonefile_data)
              f.flush()
              if fsync:
                  os.fsync(f.fileno())
  
      except Exception, e:
          log.exception(e)
          return False
          
      return True
docs: Store a validated zonefile.
      zonefile_data should be a dict.
      The caller should first authenticate the zonefile.
      Return True on success
      Return False on error