Description

5PB of storage on a Lustre based filesystem.

Resource ID
642
Global Resource ID
expanse-ps.sdsc.access-ci.org
Resource Type
Storage
Latest Status
production
Latest Status Begin
Project Affiliation
ACCESS
Organization Name
San Diego Supercomputer Center
Organization URL
https://www.sdsc.edu
Organization Logo URL
https://cider.access-ci.org/public/resource_providers/371/logo
Detail View URL
https://www.sdsc.edu/support/user_guides/expanse.html
Raw Data URL
https://operations-api.access-ci.org/wh2/cider/v1/cider_resource_id/642/
RP Description

Expanse Storage provides a 12 PB Lustre parallel filesystem for fast scratch and project I/O and a 7 PB Ceph object store for object-storage workflows. Both are accessible from every Expanse node.

OnDemand URL
https://portal.expanse.sdsc.edu/
MFA Required
On
Jobs Information

In addition to the local scratch storage, users will have access to global parallel filesystems on Expanse. Every Expanse node has access to a 12 PB Lustre parallel file system (provided by Aeon Computing) and a 7 PB Ceph Object Store system, 140 GB/second performance storage. SDSC limits the number of files that can be stored in the /lustre/scratch filesystem to 2 million files per user. Users should contact support for assistance at the ACCESS Help Desk if their workflow requires extensive small I/O, to avoid causing system issues assosiated with load on the metadata server.

The two Lustre filesystems available on Expanse are:

  • Lustre Expanse scratch filesystem: /expanse/lustre/scratch/$USER/temp_project
  • Lustre NSF projects filesystem: /expanse/lustre/projects/

SUBMITTING JOBS USING LUSTRE

Jobs that need to use the Lustre filesystem should explicitly reqeust the feature by including the following line  to their script:

#SBATCH --constraint="lustre"

This constraint can be used in combination with any other constraints you are already using. For example:

#SBATCH --constraint="lustre&persistenceoff&exclusive"

 Jobs submitted without --constraint="lustre" that need the Lustre filesystem will be scheduled on nodes without Lustre and will FAIL.

Storage Filesystems
Directory
Scratch Lustre
File System Path
/expanse/lustre/scratch
Quota (Deprecated)
10 TB
Purge Policy
90 days after allocation expiration.
Backup Policy
Not backed up​
Notes
This is not an archival file system, it is not backed up, and will be purged according to policy.
Directory
Scratch Large Memory Node
File System Path
/scratch/$USER/job_$SLURM_JOB_ID
Quota (Deprecated)
3.2 TB
Notes
Users only have access to these SSDs during job execution at the local file system path to the compute node.
Directory
Home
File System Path
/home
Quota (Deprecated)
100 GB
Backup Policy
8 week rolling backup
Notes
The home directory is limited in space and should be used only for source code storage. Jobs should never be run from the home file system, as it is not set up for high performance throughput.
Datasets
Dataset Name
OceanTopography
Dataset Description

OpenTopography provides efficient, user-friendly access to high-resolution topography data, processing tools, and resources to advance understanding of the Earth's surface, vegetation, and built environment.

Dataset Name
OpenAltimetry
Dataset Description

OpenAltimetry is a web based data visualization and discovery tool for exploring surface elevation profiles over time using satellite altimetry data from NASA's ICESat and ICESat-2 missions.

Dataset Name
OpenForest4D
Dataset Description

OpenForest4D is a web-based platform that leverages multi-source remote sensing data and artificial intelligence to generate on-demand, research-grade estimates of forest structure and above-ground biomass in four dimensions for global forest monitoring.