Comment 2 for bug 686839

Similar problem with pydrive backend.
Possibly would be fixed by fixing
"Large backup signature and manifest files should be split with --volsize too"
https://bugs.launchpad.net/duplicity/+bug/385495

Writing duplicity-full-signatures.20150928T212314Z.sigtar.gz
PyDrive backend: file 'duplicity-full-signatures.20150928T212314Z.sigtar.gz' not found in cache or on server
PyDrive backend: creating new file 'duplicity-full-signatures.20150928T212314Z.sigtar.gz'
Backtrace of previous error: Traceback (innermost last):
  File "/usr/lib/python2.7/dist-packages/duplicity/backend.py", line 365, in inner_retry
    return fn(self, *args)
  File "/usr/lib/python2.7/dist-packages/duplicity/backend.py", line 531, in move
    self.__do_put(source_path, remote_filename)
  File "/usr/lib/python2.7/dist-packages/duplicity/backend.py", line 501, in __do_put
    self.backend._put(source_path, remote_filename)
  File "/usr/lib/python2.7/dist-packages/duplicity/backends/pydrivebackend.py", line 133, in _put
    drive_file.Upload()
  File "/usr/local/lib/python2.7/dist-packages/pydrive/files.py", line 225, in Upload
    self._FilesInsert(param=param)
  File "/usr/local/lib/python2.7/dist-packages/pydrive/auth.py", line 54, in _decorated
    return decoratee(self, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pydrive/files.py", line 241, in _FilesInsert
    metadata = self.auth.service.files().insert(**param).execute()
  File "/usr/local/lib/python2.7/dist-packages/googleapiclient/discovery.py", line 795, in method
    payload = media_upload.getbytes(0, media_upload.size())
  File "/usr/local/lib/python2.7/dist-packages/googleapiclient/http.py", line 357, in getbytes
    return self._fd.read(length)
 MemoryError

Giving up after 2 attempts. MemoryError: