A brief description of each area and basic guidelines to follow are provided in the table below:

Name Path Type Permissions Backups Purged Quota Mounted on Compute nodes
User Home $HOME NFS User Set yes no 50GB Read-only
Project Home /ccs/proj/[projid] NFS 770 yes no 50GB Read-only
User Archive /home/$USER HPSS User Set no no 2TB No
Project Archive /proj/[projid] HPSS 770 no no 100TB No
Member Work /gpfs/alpine/scratch/[userid]/[projid]/ Spectrum Scale (ex. GPFS) 700 no 90 days 50TB Yes
Project Work /gpfs/alpine/proj-shared/[projid] Spectrum Scale (ex. GPFS) 770 no 90 days 50TB Yes
World Work /gpfs/alpine/world-shared/[projid] Spectrum Scale (ex. GPFS) 775 no 90 days 50TB Yes

On Summit paths to the various project-centric work storage areas are simplified by the use of environment variables that point to the proper directory on a per-user basis:

  • Member Work Directory: $MEMBERWORK/[projid]
  • Project Work Directory: $PROJWORK/[projid]
  • World Work Directory: $WORLDWORK/[projid]


  • Although there are no hard quota limits for the project storage, an upper storage limit should be reported in the project request. The available space of a project can be modified upon request.


To keep the Spectrum Scale file system exceptionally performant, files that have not been accessed in the project and user areas are purged at the intervals shown in the table above. Please make sure that valuable data is moved off of these systems regularly. See HPSS Data Archival System. for information about using the HSI and HTAR utilities to archive data on HPSS. Just to note that when you read a file, then the 90 days counter restarts.

Data Retention

By default, the OLCF does not guarantee lifetime data retention on any OLCF resources. Following a user account deactivation or project end, user and project data in non-purged areas will be retained for 90 days. After this timeframe, the OLCF retains the right to delete data. Data in purged areas remains subject to normal purge policies.