CRAY XE6 Hardware and Architecture

Hardware of Installation step 0

• 84 compute nodes / 1344 cores
  • dual socket G34
    • Magny-Cours @ 2 GHz (Opteron(tm) Processor 6128)
    • 512KB L2 Cache, 12MB L3 Cache
    • HyperTransport HT3
    • 8 cores
  • 32GB memory
• 12 service nodes
  • 6-Core AMD Opteron(tm) Processor 23 (D0)
    • 2.2GHz
    • 16GB memory
• High Speed Network CRAY Gemini
• LSI FibreChannel RAID System (SATA)
  • Parallel Filesystem
    • Lustre version 1.8.2
    • capacity 11 TB
    • 3 OST's, 1 MDS, Network Gemini
• System Management Workstation (SMW)

Architecture

• System Management Workstation (SMW)
  • system administrator's console for managing a Cray system like monitoring, installing/upgrading software, controls the hardware, starting and stopping the XE6 system.

• service nodes are classified in:
  • login nodes (xe601.hww.de) for users to access the system
  • boot nodes which provides the OS for all other nodes
  • network nodes which provides e.g. external network connections for the compute nodes
  • Cray Data Virtualization Service (DVS): is an I/O forwarding service that can parallelize the I/O transactions of an underlying POSIX-compliant file system.
  • sdb node for services like ALPS, torque, moab, cray management services,...
  • I/O nodes for e.g. lustre
  • MOM (torque) nodes for placing user jobs of the batch system in to execution

• compute nodes
  • are only available for user using the batch system.