Storage

Overview

The Resnick High Performance Computing Center provides VAST-based storage for users and research groups, mounted under /resnick.

User Home Directories

Path	Quota
`/resnick/home/<username>`	50 GB

Note

Users needing additional capacity should utilize group storage options.

Group Storage

Path	Default Quota	Additional Cost
`/resnick/groups/<groupname>`	20 TB	$8.00/TB/month beyond the free allocation

Contact help-hpc@caltech.edu to discuss quota needs and rate information for overages.

Scratch Space

Scratch storage is for temporary computational data. The infrastructure runs on the VAST filesystem at /resnick/scratch — all NVMe, so there’s no longer a separate “high-IO” tier.

Path	Storage Type	Default Quota
`/resnick/scratch`	NVMe (high performance)	20 TB

The default quota can be extended to 50 TB for 30 days upon request — email help-hpc@caltech.edu to request.

Warning

Files not accessed in 14 days are automatically purged. Manipulating file timestamps to circumvent automatic deletion is prohibited under institutional honor codes.

Snapshots

The VAST filesystem has snapshots enabled. The snapshot directory is not directly listable, but you can access it by changing into the .snapshot directory inside any VAST path:

cd /resnick/groups/<groupname>/.snapshot

Checking Your Quota

Use the hpcquota command:

hpcquota                 # home and group usage
hpcquota -s              # include scratch usage
hpcquota -a              # show all members of your group(s)
hpcquota -g <group>      # specific group
hpcquota -u <user>       # specific user
hpcquota -h              # help

Full syntax: hpcquota [-h] [-v] [-g GROUP] [-u USER] [-a] [-s].

Data Protection

Danger

No managed backup or disaster recovery system exists for cluster storage.

Users must independently migrate critical data using external services or tools.

See Backups for backup strategies.