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Compute Nodes

Quad CoreAMDOpteronprocessor

Compute Node Configuration

  • 9,572 nodes
  • 1 quad-core AMD 'Budapest' 2.3 GHz processor per node
  • 4 cores per node (38,288 total cores)
  • 8 GB DDR3 800 MHz memory per node
  • Peak Gflop rate
    • 9.2 Gflops/core
    • 36.8 Gflops/node
    • 352 Tflops for the entire machine
  • Each core has their own L1 and L2 caches, with 64 KB and 512KB respectively
  • 2 MB L3 cache shared among the 4 cores

Compute Node Software

By default the compute nodes run a restricted low-overhead operating system optimized for high performance computing called "Cray Linux Environment" (CLE). This OS supports only a limited number of system calls and UNIX commands and does not support system or user-created dynamic-load libraries.  

A single given compute node is always allocated to run a single user job; multiple jobs never share a compute node.