NERSCPowering Scientific Discovery Since 1974

Table of NERSC Resources

[NERSC Technical Documentation for Users]

NERSC Computational Systems

System Name System Type CPU Computational Pool Node Interconnect Scratch Disk Avg. Power (KW)
 Type  Speed (GHz)  Nodes Cores per Node  Total Cores Flops per Core (Gflops/sec) Peak Performance (Tflops/sec)  Aggregate Memory

 Avg. Memory/core


Cray XC40

Intel Haswell

Intel KNL













 298.5 TB 

 1.06 PB

 4 GB

DDR: 1.41 GB; MCDRAM: 0.23 GB

 Aries 28 PB (global)  4,200



NERSC Data Storage Resources

File System Path Type Peak Performance Default Quota Backed Up? Purge Policy
Global Homes $HOME GPFS file system Not intended IO jobs

40 GB
1,000,000 Inodes

Yes Not purged
Project  /project/projectdirs/projectname GPFS file system 130 GB/Second 1 TB
1,000,000 Inodes
No Not purged
Common /global/common/software/projectname GPFS file system Intended for software stacks 10 GB 1,000,000 inodes No No purged
Cori local scratch $SCRATCH (on Cori), $CSCRATCH (from other systems) Lustre file system 700 GB/Second 20 TB
10,000,000 Inodes
No Files not accessed for 12 weeks are deleted
Cori Burst Buffer $DW_JOB_STRIPED, $DW_PERSISTENT_STRIPED_XXX DataWarp (FLASH file system) 1.7 TB/s, 28M IOP/s none No Data is deleted at the end of every job, or at the end of the lifetime of the persistent reservation
Archive (HPSS) Typically accessed via hsi or htar inside of NERSC HPSS (Tape Archive) 50 GB/s to disk cache Allocation dependent No Not purged

For more details on the best usage of these file systems see the NERSC Data Storage Resources page.