Thursday, December 17, 2009

Abstraction


Source: http://imgs.xkcd.com/comics/abstraction.png

Friday, December 11, 2009

Blizzard: modeling the climate change

Impressive and elegant new German supercomputer:



Specifications:

HPC Cluster ("blizzard")

  • IBM p575 "Power6" cluster
  • water cooled
  • 16 dual core CPUs per node
  • Total size: 264 nodes, 8448 cores
    • 249 compute nodes
    • 12 I/O nodes
    • 3 interactive nodes
  • 18,8 GigaFlops/core
  • Total system peak performance: 158 TeraFlops/s
  • Top500: Rank 27 in 06/09
  • 20 TeraByte memory
  • 3 PetaByte GPFS file system (additional 3 PetaByte in 2011)
  • 8 x Qlogic 288 port 4 x DDR Infiniband switches
    • bandwidth: 16 GigaByte/s node to node (bidirectional)
    • 25.4 km Infiniband cables
  • http://www.dkrz.de/dkrz/about/hardware/HPC_Cluster

But Blizzard is connected to the Data archive:
  • HPSS: High Performance Storage System
  • 6 Sun StorageTek SL8500 tape libraries
    • 8 robots per library
    • 10 000 media slots per library
  • 73 tape drives
  • total capacity: 60 PetaByte.
  • 60.000 media (T10000 A/B, LTO4, 9940B and 9840C )
  • 500 TeraByte disk cache
  • projected fill rate: 10 PetaByte/year
  • bidirectional bandwidth: 3 GigaByte/s (sustained), 5 GigaByte/s (peak)
  • http://www.dkrz.de/dkrz/about/hardware/DataArchive
and the visualization machine:
  • 8 Vis Nodes (sva91 ... sva98)
    • HP XW 9400 Workstation
    • 2 Dual Core Opteron64 2.6 GHz
    • 32 GB RAM
    • 2 NVidia FX 5500 Graphics with 1 GB RAM
    • InfiniBand HCA
  • 1 SMP Vis Node (sva90)
    • HP ProLiant DL585 Server
    • 4 Dual Core Opteron64 2.4 GHz
    • 128 GB RAM
    • 2 NVidia FX 5500 Graphics with 1 GB RAM (via NVidia QuadroPlex)
    • InfiniBand HCA
  • 1 System Management Node (sva99)
    • HP ProLiant DL 385 Server
    • 2 Dual Core Opteron 2.2 GHz
    • 4 GB RAM
    • InfiniBand HCA
  • HP SFS (Scalable File Share) 72 TByte brutto / 48 TByte netto
    • 2 Meta Data Server (MDS)
    • 6 Object Storage Targets (OST)
    • Infiniband HCAs
  • http://www.dkrz.de/dkrz/about/hardware/vis_cluster

Wednesday, December 9, 2009

Mac and HAL

An old commercial, Think different Dave ...