Hi all,

Last week at the Galaxy Admins video hangout Nate gave an
overview of the way Python dependency handling is changing
from using egg files to using wheel files instead - slide links at:

https://wiki.galaxyproject.org/Community/GalaxyAdmins/Meetups/2016_02_18

I understand the Galaxy v16.01 (2016 January feature freeze)
release which switches from eggs to wheels is due out shortly -
hopefully this week?

Recently we've been trying to setup a replacement Galaxy instance
where jobs are submitted to our SGE cluster as the linux user
requesting the job. This has been a bumpy road, e.g.

http://dev.list.galaxyproject.org/Python-on-cluster-for-setting-metadata-after-jobs-complete-tt4668736.html

Right now we've run into a problem with the metadata scripts
trying to access ~/.python-eggs and going back over the archives
it looks like we may need to set $PYTHON_EGG_CACHE to a
temp folder on a per-node per-user basis, see e.g.

http://dev.list.galaxyproject.org/python-egg-cache-exists-error-tt4656276.html#a4656394

Sadly the wiki does not cover this aspect of running jobs as the
real user (but the egg settings are about to be obsolete):

https://wiki.galaxyproject.org/Admin/Config/Performance/Cluster#Submitting_Jobs_as_the_Real_User

Clearly with Galaxy v16.01 the eggs and $PYTHON_EGG_CACHE
will go away. What happens with wheels, Python virtual environments,
and running jobs as the real user?

Thanks,

Peter
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