Remote Data Access

Method 1 (preferred): Globus

Globus (https://www.globus.org) is our recommended data transfer tool because it is optimized for large data volumes, and it works on any platform. To use it, users simply install Globus Connect Personal (free software) on their computers and then log in to a CLASSE Globus endpoint with their CLASSE password.

Please click here for complete instructions.

• CHESS users are strongly advised to test Globus data transfers before arriving onsite, using the CHESS Test endpoint.
• CHESS users may access their data during and after their beamtime using the CHESS Raw and CHESS Aux endpoints.
• Please report any problems by opening a CLASSE-IT Service Request.

Method 2: Remote Login

CHESS users with a CLASSE account can log into CLASSE's general-purpose Linux login node, lnx201.classe.cornell.edu:

• Linux and Mac: please see RemoteLinux for instructions on using SSH, SFTP, and SCP.
• Windows: we recommend the scp client WinSCP, for which we have instructions at SFTP-SCP.

After logging into lnx201.classe.cornell.edu, CHESS users can find their files in these locations:

• Data for the current run: /nfs/chess/raw/current/[station]/[beam_time_run_id]/.
• Data from previous runs: /nfs/chess/raw/[run]/[station]/[beam_time_run_id]/.
• If a particular dataset no longer appears on disk, it can be retrieved from archival tape storage by submitting a ServiceRequest.
• Sample files for testing are available at /nfs/chess/raw/test-download/, which contains two directories:
  • small contains three small text files
  • large contains one binary file with a size of 2 GB, which may be used to measure transfer speed.

-- MarlinGuest - 14 Nov 2023