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CRAY XE6 Hardware and Architecture
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Hardware of Installation step 0
- 84 compute nodes / 1344 cores
- dual socket G34
- 2x Opteron(tm) Processor 6128 (Magny-Cours) mit 8 Cores @ 2 GHz
- 512KB L2 Cache, 12MB L3 Cache
- HyperTransport HT3, 6.4GT/s=102.4 GB/s
- 2*8= 16 Cores/Node, Peak Performance: 2CPUs*8Cores/CPU*2GCycle/s*4FLOP/Cycle= 128 GFLOP/s
- 32GB memory
- dual socket G34
- 12 service nodes
- 6-Core AMD Opteron(tm) Processor 23 (D0)
- 2.2GHz
- 16GB memory
- 6-Core AMD Opteron(tm) Processor 23 (D0)
- 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
- Parallel Filesystem
- 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, licenses,...
- 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 and the Application Level Placement Scheduler (ALPS), see running applications.
Features
- Cray Linux Environment (CLE) 3.1 operating system
- Operating System is based on SUSE Linux Enterprise Server (SLES) 11
- Cray Gemini interconnection network
- Cluster Compatibility Mode (CCM) functionality enables cluster-based independent software vendor (ISV) applications to run without modification on Cray systems.
- Batch System: torque, moab
- many development tools available:
- Compiler: Cray, PGI, GNU,
- Debugging: DDT, ATP,...
- Performance Analysis: CrayPat, Cray Apprentice, PAPI
- Libraries: BLAS, LAPACK, FFTW, PETSc, MPT,....
Pictures
