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ANDREW.CMU.EDU authentication is now the default for the ECE Community clusters (“number cluster”, ECE-GUI cluster, and HH1305 lab linux machines).

The default home directory will be within your Andrew AFS space (/afs/andrew.cmu.edu/usr/$USER/).

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• Andrew AFS space (ie, /afs/andrew.cmu.edu/usr/$USER/) has 2GB of quota, ECE ITS has no ability to modify anything there, or increase it.

• ECE ITS provides more quota to ECE community users, fs lq /afs/ece.cmu.edu/usr/$USER/ to see your ECE AFS space quota.

  • Use ECE space for larger data needs, if you don’t have permissions within your ECE AFS space, make sure to aklog ece.cmu.edu

    • We can increase

    these a bit

    • ECE AFS space upon request for larger projects,

    but

    • ECE AFS space starts at 25GB.

    • Please contact ITS if you require assistance.

• scratch space exists as /scratch (a local disk mount on linux hosts) which can be used for temporary/intermediate data.

  • As the /scratch directory is cleared daily of old files (>28days), ensure that any important data is copied elsewhere.

  • There is no currently no quota, however this space is shared across all users of the machine, please be respectful of the amount of data you store there.

What is using up my quota?

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• "du -hsc ~/* ~/.??" will show you where your quota is being used. OldFiles is the last backup, so you can ignore that counting against your quota.

Where are my files, I do not see files I had in my home directory?

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• You want to verify AFS tokens with the tokens command:

  • tokens

• If you do not have tokens for the cell(s) (andrew.cmu.edu ; ece.cmu.edu) you want, you should execute aklog with the cell:

  • aklog ece.cmu.edu

  • aklog andrew.cmu.edu

• To make the above command easier ~/.xlog can have the cell names. Note: this command only needs to be run once!

  • echo -e 'andrew.cmu.edu\nece.cmu.edu' > ~/.xlog

    • aklog

• Kerberos tickets or AFS tokens may have expired

  • examine klist -A and tokens, and renew if needed

    • kinit && aklog

• If these don’t solve the issue, and you believe it to be ACL related:

  • View the below item “How can I fix permission issues myself?”

I would prefer to use my ECE home directory, How can I do that?

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How can I fix legacy permission issues within ECE AFS space myself?

• If you have a legacy ECE account (prior to 2020): SSH to fileexchange.cit.cmu.edu with your ECE account and change them.

  • After login via ssh, run (on one line):

    • find /afs/ece.cmu.edu/usr/$USER -type d -exec fs sa {} $USER@andrew.cmu.edu all \;

    • Substitute path for external project space, or group access as needed.