The Livermore Computing Center recognizes that our user's work can be seriously impacted by the unavailability of systems and services. Unfortunately, some amount of interruption in service is unavoidable. The Center strives to minimize user disruption caused by scheduled interruptions for repairs, updates, installation of new equipment, troubleshooting, or preventive maintenance.

This page provides links to ASC policies, LC policies, and LLNL policies.

We are scheduling large dedicated application runs on M&IC machines, usually during a weekend. Some of these runs may require that the entire machine be dedicated to them.

This is a policy governing the use of the /usr/gapps subdirectory, available on LC production computing resources.

The /usr/gapps file system contain user-supported files that are shared with a number of users, such as applications codes, files used to execute these codes, and source codes maintained or used by a group of LC users.


FTP (File Transfer Protocol) is an industry-standard protocol and user interface for transferring files between computer systems by means of a series of interactive commands. FTP involves a local client (software you execute to send or receive files) and a remote server (software elsewhere that responds to instructions from your client to accept or deliver files).

This page includes a table that helps determine what is needed to access classified (SCF), unclassified Collaboration Zone (OCF-CZ), and unclassified Restricted Zone (OCF-RZ) Livermore Computing (LC) systems.

New Account Setup outlines how to get an account on the Open Computing Facility (OCF) CZ and RZ systems and the Secure Computing Facility (SCF). You may also use the Livermore Computing (LC) Identity Management (IDM) System to request and manage accounts.

An LC Computer Coordinator is the point of contact between LC and the user community the Coordinator represents.

Forms are provided for those requests not available through the LC IdM System. Interactive HTML and PDF versions are forms you complete on the Web. Non-interactive PDF versions are to print out and complete by hand.

For a list of the current Sandia platforms, with links to documentation, please see https://computing.sandia.gov/platforms.