code: def atlas_peer_download_zonefile_inventory( my_hostport, peer_hostport, maxlen, bit_offset=0, timeout=None, peer_table={} ):
      
  
      if timeout is None:
          timeout = atlas_inv_timeout()
  
      interval = 524288       # number of bits in 64KB
      peer_inv = ""
  
      log.debug("Download zonefile inventory %s-%s from %s" % (bit_offset, maxlen, peer_hostport))
  
      if bit_offset > maxlen:
          # synced already
          return peer_inv
  
      for offset in xrange( bit_offset, maxlen, interval):
          next_inv = atlas_peer_get_zonefile_inventory_range( my_hostport, peer_hostport, offset, interval, timeout=timeout, peer_table=peer_table )
          if next_inv is None:
              # partial failure
              log.debug("Failed to sync inventory for %s from %s to %s" % (peer_hostport, offset, offset+interval))
              break
  
          peer_inv += next_inv
          if len(next_inv) < interval:
              # end-of-interval
              break
  
      return peer_inv
docs: Get the zonefile inventory from the remote peer
      Start from the given bit_offset
  
      NOTE: this doesn't update the peer table health by default;
      you'll have to explicitly pass in a peer table (i.e. setting
      to {} ensures that nothing happens).