LDAS @ Caltech¶

Key information
Home page
Account sign-up	https://grouper.ligo.org/ldg/
Support	ldas_admin_cit@ligo.caltech.edu

Hostname	Description	Memory	CPU model	# core	# GPU
`ldas-grid`	Production submit	64G	E5-2630 v3	16
`ldas-osg`	OSG submit machine	200G	Gold 6136	24
`ldas-pcdev1`	Large mem/post-processing	512G	E5-4650	32
`ldas-pcdev2`	Large mem/post processing	512G	E5-4650	32	6
`ldas-pcdev3`	GPU/post-processing	128G	E5-2670	16	3
`ldas-pcdev4`	LSCSOFT update testing	128G	E5-2640 v3	16
`ldas-pcdev5`	Post-processing	512G	E5-2698 v4	40
`ldas-pcdev6`	Large mem/Post-processing	1.5T	Gold 6154	72
`ldas-pcdev7`	Broadwell benchmarking	32G	E3-1285 v4	4
`ldas-pcdev8`	GPU/optimized LSCSOFT RPM	96G	Gold 5115	10	1
`ldas-pcdev9`	Broadwell benchmarking	32G	E3-1285 v4	4
`ldas-pcdev10`	Skylake benchmarking	64G	E3-1240 v5	4
`ldas-pcdev11`	GPU	128G	E5-2630 v4	20	4
`ldas-pcdev12`	Skylake benchmarking	64G	E3-1240 v5	4
`ldas-pcdev13`	GPU	128G	E5-2650 v4	24	4
`ldas-pcdev14`	Large mem benchmarking	256G	AMD-6376	16
`ldas-pcdev15`	RHEL7.7 Beta	64G	E5-1660 v3	8
`ldas-pcdev16`	Fedora Core 28	4G	KVM	2
`ldas-pcdev17`	Fedora Core 29	4G	KVM	2
`cbc`	Dedicated CBC	64G	E5-2630 v3	16
`cwb`	Dedicated cWB	256G	E5-2650 v4	24
`detchar`	Dedicated DetChar	128G	E5-2630 v3	16
`emfollow`	Dedicated EM Follow-up	64G	E5-2630 v3	16
`lowlatency`	Dedicated low-latency	64G	E5-2630 v3	16

Additional services¶

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