Similar suggestions here:

When you are working with only single instance, you can set ``qiime_temp_dir`` to point to a directory on a larger partition (exactly where will depend on your instance configuration), or to the drive created as described in :ref:`creating-a-volume-for-persistent-storage-across-different-launches-of-an-instance-or-different-instances`. When working in a parallel environment with multiple instances (e.g., with StarCluster (:ref:`using-qiime-with-starcluster-and-the-ipython-notebook`)) ``qiime_temp_dir`` will need to be set to a folder that is NFS shared across the instances (again, this will depend on your specific configuration).