Computing Resources at the SSCC

The SSCC makes a tremendous amount of computing power available to its members. This article will help you find the computing resource that can do the job you need done.


Winstat is SSCC's general purpose computing farm. It consists of 14 Windows Remote Desktop Servers that you can log into remotely to run a wide variety of statistical and other software with full access to the SSCC network.

The Winstat servers have 16 cores available and 80 gigabytes of RAM. To ensure high performance for everyone, we ask that on Winstat you run just one CPU-intensive program at a time, which can use up to 8 cores and 40 gigabytes of RAM.

Winstat sessions are disconnected after 24 hours without input from the user, and disconnected sessions are terminated after three hours.

For more information about Winstat, see Using Winstat.

Long Jobs Winstat

Long Jobs Winstat is designed for computationally demanding jobs. It is almost identical to Winstat, but its 3 servers have 16 cores and 160 gigabytes of RAM. It also does not shut down disconnected sessions, so you can start a job, disconnect, and get your results hours or days later.

If you are running jobs that would be a good candidate for Long Jobs Winstat, email the help desk to get access to it.


Linstat provides even more computing power. It consists of 5 servers running Linux (which many power users find more convenient for big computing projects). Four of them (Linstat1-4) have 16 cores and 320 gigabytes of RAM. They also have about 240 gigabytes of local temporary disk space. The fifth (Linstat5) is newer and has 36 cores, 384 gigabytes of RAM, and 350 gigabytes of local temporary disk space. The Linstat servers have the most popular statistical software installed plus the usual Linux utilities and compilers.

To ensure high performance for everyone, we ask that you run just one CPU-intensive program at a time on each Linstat server (though it is welcome to use multiple cores) and use no more than 64 gigabytes of memory. Exceptions can be made--contact the Help Desk if you need to use more memory. Jobs run "in the background" on Linstat will continue running after you log out, for days or weeks if necessary.

For more information about using Linstat, see Using Linstat.


HTCondor is a tool for running large numbers of jobs. When you submit a job to HTCondor, HTCondor can send it to any server in its "flock." SSCC's HTCondor flock has four dedicated Linux servers, and the Linstat servers run jobs submitted to HTCondor as well.

You are always welcome to submit up to fifteen jobs at a time to HTCondor, and sometimes more depending on how many servers are available (see the SSCC's Server Usage Policy).

HTCondor jobs will be assigned to the Linstat servers if they are available. The rest of the machines in the Condor flock have 8 cores, 24-48 gigabytes of RAM, and about 200 gigabytes of local temporary disk space.

For more information about Condor, see An Introduction to Condor. You can also submit Stata jobs to Condor from the web.


SCC's High Performance Computing Cluster, Flash, is designed for parallel computing. It is ideal for jobs that can be broken up into many pieces that are executed simultaneously. Most jobs run on Flash are written in FORTRAN and use MPI to handle the parallelization.

For more information about Flash, see Using the SSCC's High Performance Computing Cluster.


Silo is a special computing environment for sensitive data, including data covered by HIPAA. It is actually split into two environments:

Silo LDS is appropriate for HIPAA "Limited Data Sets" and other data with similar security requirements. It includes WinLDS, a server very similar to Winstat with 16 cores and 20 gigabytes of RAM. For more information, see Using the Silo LDS Environment.

Silo RD is appropriate for HIPAA "Protected Health Information" and restricted data sets with similar requirements. It includes WinRD, a server very similar to Winstat with 2 cores and 4 gigabytes of RAM, and LinRD, a server very similar to Linstat with 4 cores and 24 gigabytes of RAM. For more information, see Using the Silo RD Environment.

If need to use data that cannot be stored on any network, Data & Information Services Center (DISC) makes a Secure Computing Enclave available.

Lab PCs

The SSCC's computer labs, rooms 4218 and 3218 in the Sewell Social Sciences Building, have more than 50 PCs with most of the software installed on Winstat. They also have client programs installed for accessing all the SSCC servers. This makes the labs an excellent place to do research.

For more information about the SSCC's computer labs, see SSCC Computer Labs and Information for SSCC Instructional Lab Users.

Last Revised: 5/31/2017