While the hardware provided for Lighthouse may vary by PI, the login nodes and process remains uniform.  All Lighthouse users should login to lighthouse.arc-ts.umich.edu in order to submit jobs. Detailed instructions are available in the Lighthouse User Guide.


The compute nodes are all interconnected with InfiniBand networking. In addition to the InfiniBand, there is a gigabit Ethernet network that also connects all of the nodes.


Both home directories and /scratch storage space is provided by Turbo, our high-speed data storage service. Until May 2019, we will also have the Flux home and scratch directories mounted in a read-only state to aid in migrating data to Lighthouse; these will be mounted as /oldhome and /oldscratch.

See our list of storage options to find the best fit for your needs.


Computing jobs on Lighthouse are managed completely through Slurm. See the Lighthouse User Guide for directions on how to submit and manage jobs.


There are three layers of software on Lighthouse:

Operating Software

The Lighthouse cluster runs Redhat 8. We update the operating system on Lighthouse as Redhat releases new versions and our library of third-party applications offers support. Due to the need to support several types of drivers (AFS and Lustre file system drivers, InfiniBand network drivers and NVIDIA GPU drivers) and dozens of third party applications, we are cautious in upgrading and can lag Redhat releases by months.

Compilers and Parallel and Scientific Libraries

Lighthouse supports the Gnu Compiler Collection, the Intel Compilers, and the PGI Compilers for C and Fortran. The Lighthouse cluster’s parallel library is OpenMPI, and the default versions are 1.10.7 (i686) and 3.1.2 (x86_64), and there are limited earlier versions available.  Lighthouse provides the Intel Math Kernel Library (MKL) set of high-performance mathematical libraries. Other common scientific libraries are compiled from source and include HDF5, NetCDF, FFTW3, Boost, and others.

Please contact us at arcts-support@umich.edu if you have questions about the availability of, or support for, any other compilers or libraries.

If you have questions, please send email to arcts-support@umich.edu.

Order Service

Principal Investigators: Email arcts-support@umich.edu before including hardware in a proposal or purchasing hardware.  Once a plan is in place, you will work with support to get a subscription to Lighthouse for each node.

You also need a Lighthouse user login to access your nodes.

Related Events

June 3 @ 7:00 am - June 5 @ 5:00 pm

Great Lakes, Lighthouse, Armis2 2024 Summer Maintenance

Due to maintenance, the high-performance computing (HPC) clusters and their storage systems (/home and /scratch) will be unavailable: Great Lakes, Armis2, Lighthouse: Monday, June 3, 2024, 7am – Wednesday, June 5,…