Project-Centric Data Storage

Project directories provide members of a project with a common place to store code, data, and other files related to their project.

Project Home Directories (NFS)

Name Path Type Permissions Backups Purged Quota
Project Home /ccs/proj/[projid] NFS 770 yes no 50GB

Projects are provided with a Project Home storage area in the NFS-mounted filesystem. This area is intended for storage of data, code, and other files that are of interest to all members of a project. Since Project Home is an NFS-mounted filesystem, its performance will not be as high as other filesystems.

Project Home Path

Project Home area is accessible at /ccs/proj/abc123 (where abc123 is your project ID).

Project Home Quotas

To check your project’s current usage, run df -h /ccs/proj/abc123 (where abc123 is your project ID). Quotas are enforced on project home directories. The current limit is shown in the table above.

Project Home Permissions

The default permissions for project home directories are 0770 (full access to the user and group). The directory is owned by root and the group includes the project’s group members. All members of a project should also be members of that group-specific project. For example, all members of project “ABC123” should be members of the “abc123” UNIX group.

Three Project Work Areas to Facilitate Collaboration

To facilitate collaboration among researchers, the OLCF provides (3) distinct types of project-centric work storage areas: Member Work directories, Project Work directories, and World Work directories. Each directory should be used for storing files generated by computationally-intensive HPC jobs related to a project.

Name Path Type Permissions Backups Purged Quota
Member Work /gpfs/alpine/scratch/[userid]/[projid] Spectrum Scale 700 no 90 days 50TB
Project Work /gpfs/alpine/proj-shared/[projid] Spectrum Scale 770 no 90 days 50TB
World Work /gpfs/alpine/world-shared/[projid] Spectrum Scale 775 no 90 days 50TB

The difference between the three lies in the accessibility of the data to project members and to researchers outside of the project. Member Work directories are accessible only by an individual project member by default. Project Work directories are accessible by all project members. World Work directories are readable by any user on the system.


UNIX Permissions on each project-centric work storage area differ according to the area’s intended collaborative use. Under this setup, the process of sharing data with other researchers amounts to simply ensuring that the data resides in the proper work directory.

  • Member Work Directory: 700
  • Project Work Directory: 770
  • World Work Directory: 775

For example, if you have data that must be restricted only to yourself, keep them in your Member Work directory for that project (and leave the default permissions unchanged). If you have data that you intend to share with researchers within your project, keep them in the project’s Project Work directory. If you have data that you intend to share with researchers outside of a project, keep them in the project’s World Work directory.


Member Work, Project Work, and World Work directories are not backed up. Project members are responsible for backing up these files, either to Project Archive areas (HPSS) or to an off-site location.

Project Archive Directories

Name Path Type Permissions Backups Purged Quota
Project Archive /proj/[projid] HPSS 770 no no 100TB

Projects are also allocated project-specific archival space on the High Performance Storage System (HPSS). The default quota is shown on the table above. If a higher quota is needed, contact the User Assistance Center.

The Project Archive space on HPSS is intended for storage of data not immediately needed in either Project Home (NFS) areas nor Project Work (Alpine) areas, and to serve as a location to store backup copies of project-related files.

Project Archive Path

The project archive directories are located at /proj/pjt000 (where pjt000 is your Project ID).

Project Archive Access

Project Archive directories may only be accessed via utilities called HSI and HTAR. For more information on using HSI or HTAR, see the HPSS Data Archival System section.