LDAS @ LIGO-Livingston¶

Key information
Home page
Account sign-up	See Requesting an account on the LDG page
Support	ldas_admin_llo@ligo.caltech.edu

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

Hostname	Description	Memory	CPU model	# core	GPU
`ldas-grid`	Production submit	64GB	2 x 2.4GHz Xeon E5-2630v3	16
`ldas-pcdev1`	Large mem/post-processing	128GB	2 x 2.4GHz Xeon E5-2630v3	16
`ldas-pcdev2`	Large mem/post-processing	512GB	4 x 2.7GHz Xeon E5-4650	32	4 x Tesla K10 + 2 x GTX750
`ldas-pcdev4`		16GB	2 x AMD Opteron 2376	8
`ldas-pcdev5`		512GB	2 x 2.2GHz Xeon E5-2698v4	40
`ldas-pcdev6`		1.5TB	4 x 3.0GHz Xeon Gold 6154	72
`detchar`	Dedicated DetChar	128GB	2 x 2.4GHz Xeon E5-2630v3	16
`dgx1`		512GB	2 x 2.2GHz Xeon E5-2698v4	40	8 x Tesla V100-SXM2-16GB

Additional services¶

Service	URL
JupyterLab	https://jupyter.ligo-la.caltech.edu
User webspace	https://ldas-jobs.ligo-la.caltech.edu/~USER/

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 compiler and libraries¶

Enabling/disabling the intel compiler¶

The Intel compiler icc is available on the command path by default, and can be discovered using which:

$ which icc
/ldcg/intel/2019u4/bin/icc

Note

This available icc version will track the reference version at any given time, so will be updated from time-to-time according to approval from the Software Change Control Board.

Enabling a specific version of ICC

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

touch ~/.useicc_2019u4

Listing available Intel software releases

To list the available Intel releases, just run this:

ls /ldcg/intel/

Enabling/disabling the intel compiler and libraries¶

While the Intel compiler is available by default, the Intel lirbaries (e.g. MKL) are not, because they can interfere with other libraries if not carefully configured.

Enabling a specific version of the Intel compiler and libraries

To opt in to a specific release of the Intel compiler and libraries, create a file in your ${HOME} directory named .useintel_{release}, where {release} is the release number that you want, e.g:

touch ~/.useintel_2019u4

Disabling the Intel compiler and libraries¶

Disabling the Intel compilers and libraries

To opt out of having the Intel compiler or any libraries available, create a file in your ${HOME} directory named .nointel:

touch ~/.nointel

Warning

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

MATLAB¶

Enabling MATLAB¶

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

$ which matlab
/ldcg/matlab_r2015a/bin/matlab

Note

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