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LDAS @ Caltech

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SSH CA Cert @cert-authority * ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBHa03AZF3CvJ1C4Po15swSaMYI4kPszyBH/uOKHQYvu+EpehSfMZMaX5D7pUpc5cAXvMEEFzlZJQH4pOioIlqyE= IGWN_CIT_SSH_CERT_AUTHORITY

This service is available for all @LIGO.ORG registered collaboration members with accounts and access coordinated as part of the LIGO Data Grid.

Login hosts

Hostname Description Mem CPU model Core GPU Production submit 64G AMD EPYC 7402 VM 16 IGWN OSG submit machine 196G Intel Gold 6136 24 Large mem/post-processing 1T AMD EPYC 7H12 128 GPU mixed 256G AMD EPYC 7502P 32 4 GPU mixed 128G Intel E5-2670 16 3 LSCSOFT update testing 128G Intel E5-2640 v3 16 Post-processing 512G Intel E5-2698 v4 40 Large mem/Post-processing 1.5T Intel Gold 6154 72 GPU TITAN V/optimized LSCSOFT RPM 96G Intel Gold 5115 10 1 Skylake benchmarking 64G Intel E3-1240 v5 4 GPU mixed 128G Intel E5-2630 v4 20 4 GPU 4 x A100-SXM4-80GB 512G AMD EPYC 7763 128 4 GPU mixed 128G Intel E5-2650 v4 24 4 Large mem benchmarking 256G AMD Opteron 6376 16 Rocky Linux 8.4 4G AMD EPYC 7402 2 Dedicated CBC 64G Intel E5-2630 v3 16 Dedicated cWB 256G Intel E5-2650 v4 24 Dedicated DetChar 128G Intel E5-2630 v3 16 Dedicated EM Follow-up 64G AMD EPYC 7402 VM 16 Dedicated GstLAL 32G AMD EPYC 7402 VM 8 Dedicated low-latency 64G Intel E5-2630 v3 16 Dedicated SPIIR 32G AMD EPYC 7402 VM 8

For details on how to connect to these machines, please see Access to the LIGO Data Grid.

Additional services

Service URL
User webspace

Configuring your user environment on LDAS

This page describes the default user environments on LDAS, and how to customise availability and versions of the following software distributions:

Intel oneAPI

The Intel oneAPI Base Toolkit is available by default on LDAS, with the exception of the intelpython and mpi modules.

Disabling all Intel modules

To disable loading of all Intel oneAPI modules, create an empty file in your home directory called ~/.nointel:

touch ~/.nointel

Customising the included oneAPI modules

To take full control over which modules to include/exclude (including pinning specific versions) please create ~/.oneapi_config.txt that takes precedence over the default /opt/intel/oneapi/oneapi_config.txt


Enabling MATLAB

MATLAB is available on the command path by default, and can be discovered using which:

$ which matlab


The default matlab version will be updated from time-to-time according to approval from the Software Change Control Board.

Enabling a specific version of MATLAB

To select a specific version of MATLAB, create a file in your ${HOME} directory named .usematlab_{release}, where {release} is the release number of MATLAB that you want, e.g:

touch ~/.usematlab_r2019a

Listing available MATLAB releases

To list the available MATLAB releases, just run this:

ls /ldcg/ | grep matlab

Disabling MATLAB

Disabling MATLAB

To opt out of all MATLAB releases, create a file in your ${HOME} directory named .nomatlab:

touch ~/.nomatlab


~/.nomatlab takes precedence over any ~/.usematlab_* files, so if you want to opt in after previously opting out, make sure and remove the old ~/.nomatlab file.