All the commands are executed on your local machine, the purpose of this tutorial is to be able to use globus-url-copy to copy efficiently data back and forth between your local machine and a XSEDE Supercomputer on the command line.

For a simpler point and click web interface, install Globus Conect Personal instead:

Install Globus toolkit


On Ubuntu, download the deb of the Globus repo from:

sudo dpkg -i globus-toolkit-repo_latest_all.deb
sudo apt-get install globus-data-management-client

Install XSEDE certificates on your machine

tar xvf xsede-certs.tar.gz
sudo mv certificates /etc/grid-security

Full instructions here:

Authenticate with the myproxy provided by XSEDE

Authenticate with your XSEDE user and password:

myproxy-logon -s -l $USER -t 36

You can specify the lifetime of the certificate in hours with -t.

you should get a certificate:

A credential has been received for user zonca in /tmp/x509up_u1000.

You can check how much time is left on a certificate by running grid-proxy-info.

Run globus-url-copy

For example copy to my home on Comet:

globus-url-copy -vb -p 4 local_file.tar.gz gsi

See the quickstart guide on the most used globus-url-copy options:

Synchronize 2 folders

Only copy new files using the -sync and -sync-level options:

  Only transfer files where the destination does not exist or differs from the source. -sync-level controls how to determine if files differ.
-sync-level number
  Criteria for determining if files differ when performing a sync transfer. The default sync level is 2.\

The available levels are:

  • Level 0 will only transfer if the destination does not exist.
  • Level 1 will transfer if the size of the destination does not match the size of the source.
  • Level 2 will transfer if the time stamp of the destination is older than the time stamp of the source.
  • Level 3 will perform a checksum of the source and destination and transfer if the checksums do not match.