How to change default duplicity archive directory?

How can I change the duplicity default archive directory (~/.cache/)? The following option seems to be ignored.

Option --archive-dir=/volume4/duplicity/cache/ --name backup

duplicity 0.6.21 (January 23, 2013)
Linux 3.2.40 #4458 SMP Thu Mar 6 14:16:00 CST 2014
/usr/bin/python 2.7.6 (default, Nov 11 2013, 13:32:18)
[GCC 4.6.4 20120731 (prerelease)]

Duplicity Args

Args: /opt/bin/duplicity --no-encryption --verbosity=5 --archive-dir=/volume4/duplicity/cache/ --name backup --tempdir /volume4/tmp/ --full-if-older-than 14D --volsize 100 /volume1/data file:///volume3/backup

Duplicity use the default cache directory instead the defined --archive-dir

Connecting with backend: LocalBackend
Archive dir: /root/.cache/duplicity/fb29be0e131386b16ed08d63a092fcc4

Duplicity use --archive-dir for temp files only, but not as local archive directory.

Using temporary directory /volume4/duplicity/cache/backup/duplicity-6b4wDx-tempdir
Deleting /volume4/duplicity/cache/backup/duplicity-inc.20140317T222627Z.to.20140317T222916Z.manifest

Which option should be used to change the archive directory?

Solution 1:

You are actually using the right option, but duplicity will ignore it due to the equals sign =.

So rather than using

--archive-dir=/volume4/duplicity/cache/ --name backup

you must use:

--archive-dir /volume4/duplicity/cache/ --name backup

Solution 2:

I have the same problem, using systemrescuecd, which is a livecd.

I had to symlink /root/.cache/duplicity to a tempdir on a mounted harddrive as a solution.