S3DF: SLAC Shared Science Data Facility Hosts USDF

The USDF is hosted on the S3DF cluster at SLAC. The resource is shared amongst projects, and is documented here:


The following login load-balancer is run by SLAC to jump to select Rubin Observatory development resources at SLAC (almost nothing useful can be done here. Use the jump nodes):

  • s3dflogin.slac.stanford.edu

USDF usage questions can be posted to slack #ops-usdf. Announcements will go to #ops-usdf-announce.

Connecting and Authenticating to Rubin servers

You’ll need to be a member of the rubin_users unix group to access pretty much anything Rubin. If you’re finding you’re not, this is probably why. Ask to be added in the #ops-usdf slack channel.

You can use NoMachine for ssh access as well:


You should ssh into Rubin Observatory development servers at SLAC with your unix account and password. It is only visible from the s3df login nodes. Use the load balancer:

ssh rubin-devl (note: do not add the .slac.stanford.edu postfix!)

Passwordless ssh access to rubin-devl

You can modify your .ssh config to allow direct passwordless access from your device to rubin-devl, by adding this to your .ssh/config file on your end:

Host slac*
        User <you>

Host slacl
        Hostname s3dflogin.slac.stanford.edu

Host slacd
        Hostname rubin-devl
        ProxyJump slacl

and then add your e.g. ~/.ssh/id_rsa.pub from from your device to ~/.ssh/authorized_keys at SLAC.

Outbound Access

Currently the s3df is in private IP space, so a squid proxy is used to access the outside world. Your .bashrc was configured when your account got created to set environment variables to make use of the proxy. You should not overwrite the section of your .bashc that sets HTTPS_PROXY (and similar).

Should you have overwritten your .bashrc, this snippet is what set up the environment variables:

# SLAC S3DF - source all files under ~/.profile.d
if [[ -e ~/.profile.d && -n "$(ls -A ~/.profile.d/)" ]]; then
   source <(cat $(find -L  ~/.profile.d -name '*.conf'))

Staff RSP

An RSP has been deployed. Your SLAC unix credential will be used for authentication.