The National Institute for Computational Sciences

File Systems


Darter has access to two file systems:

  • Network File System (NFS)
  • Medusa File System (Lustre)

Network File System (NFS)

The Network File Service (NFS) server contains user's home directories, project directories, and software directories. Home and project directories can be used to store frequently used items such as source code, binaries, and scripts. Both are accessible from all interactive NICS resources. For further information please follow this link.

Medusa File Systems (Lustre)

All Darter users have access to the Medusa file system providing 1.3PB of scratch space. This space can be accessed at:


This space is intended for production work and not long term storage. This space is temporary and is subject to frequent purging to ensure the stability of the system for all users. Compute nodes do not have access to home and project directories on NFS. Compute nodes only have access to the Lustre filesystems.

Optimizing your IO performance will not only lessen the load on Lustre, it will save you compute time as well. Please consider reading the Lustre Striping Guide which we believe will help you make the best use of the parallel Lustre filesystem and improve your application's I/O performance.