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LDAS @ LIGO-Livingston

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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 Memory CPU model # core GPU Production submit 64GB 2 x 2.4GHz Xeon E5-2630v3 16 Large mem/post-processing 128GB 2 x 2.4GHz Xeon E5-2630v3 16 Large mem/post-processing 512GB 4 x 2.7GHz Xeon E5-4650 32 4 x Tesla K10 + 2 x GTX750 16GB 2 x AMD Opteron 2376 8 512GB 2 x 2.2GHz Xeon E5-2698v4 40 1.5TB 4 x 3.0GHz Xeon Gold 6154 72 Dedicated DetChar 128GB 2 x 2.4GHz Xeon E5-2630v3 16 512GB 2 x 2.2GHz Xeon E5-2698v4 40 8 x Tesla V100-SXM2-16GB

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

Additional services

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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.