VSC-4 and VSC-4 provide two unified facilities for data: the high-performance IBM Storage Scale Parallel Filesystem and a node-local flash storage. The parallel filesystem is the same on both clusters, so projects that exist on both clusters can access the same data. They are accessible under:

• IBM Spectrum Scale:
  • $HOME expands to /home/fs<project>/<username>,
  • $DATA expands to /gpfs/data/fs<project>/<username>
• Local SSD
  • /local

$HOME is the location of the user UNIX home directory. It can be accessed from login and compute nodes. $HOME should be used for storing/compiling code - data for which high concurrent job throughput and support for large file sizes is not required. Quota on $HOME is 100GB and 10^6 number of files and the size can not be extended (number of files can be).

$DATA is a tiered file system containing 500TB flash and around 5PB of HDD storage. Quota on $DATA is 10TB and 10^6 number of files and can be extended up to 100TB. If even more size is needed, specific arrangements can be made.

/local is a locally mounted NVMe disk. The size is about 450GB on VSC-4 and 1.8TB on VSC-5. Data retention is not guaranteed, al data is lost on a reboot, so they need to be transferred after use.

Backup of user files independent of location is solely the responsibility of each user.