The LIGO Data Grid (LDG)¶
The LIGO Data Grid (LDG) is a coordinated set of distributed computing centres operated by LIGO member groups as a subset of the IGWN Computing Grid. These computing centres share authentication infrastructure, among other things, to present a similar user experience across locations.
Requesting an account¶
To request an account on the LIGO Data Grid, please complete the form at
A KAGRA account holder can request an account on the LIGO Data Grid by completing the form at
Reinstatement of an account¶
If a user's LIGO.ORG account expired and then got reactivated, their LDG account does not get automatically reactivated. The user will have to again complete the form at https://ldg.ligo.org
Access to the LIGO Data Grid¶
LIGO.ORG account holders can access the LIGO Data Grid in a few different ways:
- Indirectly with
- Directly with
sshusing SSH key
- Directly with
sshusing Kerberos TGT
The SSH portal
ssh.ligo.org can be accessed using a LIGO.ORG username and password
Upon login, users will be presented with an interactive menu from which to choose the host to be connected to.
ssh.ligo.org login menu
::: LIGO Data Grid Login Menu ::: Select from these LDG sites: 0. Logout 1. CDF - Cardiff University, Cardiff (UK) [Registered Users Only] 2. CIT - California Institute of Technology, Pasadena, CA (USA) 3. LHO - LIGO Hanford Observatory - Hanford, WA (USA) 4. LLO - LIGO Livingston Observatory - Livingston, LA (USA) 5. NIK - Dutch National e-Infrastructure, Amsterdam (Netherlands) 6. PSU - Penn State University, Pennsylvania, PA (USA) 7. UWM - Center for Gravitation, Cosmology & Astrophysics (Milwaukee, WI, USA) 8. IUCAA - Inter-University Centre for Astronomy & Astrophysics, Pune (India) ------------------------------------------------------------- Z. Specify alternative user account Enter selection from the list above:
2. Direct SSH access with an SSH key¶
LIGO.ORG account holders can manage SSH keys for use in accessing the LIGO Data Grid at https://ldg.ligo.org/ldg/manage_ssh/.
KAGRA account holders can manage SSH keys for use in accessing the LIGO Data Grid at https://registry.gw-astronomy.org/
Once an SSH key has been uploaded, it can be used to connect directly to the desired computing centre host:
<hostname> should be replaced with the name of the target login host, e.g.
ligo.gravity.cf.ac.uk (the Hawk login host).
Please refer to the documentation for each computing centre for a list of login host names.
3. Direct access with Kerberos TGT¶
Kerberos credential is now supported at CIT, LHO and LLO for SSH sessions. For detailed instruction, go to https://wiki.ligo.org/Computing/LDG/KerberosSSHLogin.
DEPRECATED: GSI-enabled SSH¶
Using the GSI-enabled SSH tools from Globus, e.g.
gsiscp, to connect to LDG resources is no longer supported, please select one of the options above to use non-GSI SSH tools.