High Performance Computing

Puhti Supercomputer

The new air-cooled supercomputer Puhti is now available for researchers.


Puhti supercomputer

  • In total 682 CPU nodes, with a theoretical peak performance of 1.8 Petaflops
  • Each node is equiped with two latest generation Intel Xeon processors, code name Cascade Lake, with 20 cores each running at 2.1 GHz (Xeon Gold 6230)
  • The 682 compute nodes have a mix of memory sizes:
    • 192 GB on 532 nodes
    • 384 GB on 132 nodes, with 40 also containing a 3.2 TB NVMe disk for fast local storage
    • 768 GB on 12 nodes
    • 1.5 TB on 6 nodes
  • Interconnect network HDR InfiniBand 200 Gbps by Mellanox, nodes connected with 100Gbps HDR100 links
  • 4+ PB Lustre parallel storage system by DDN

 Puhti-AI Artificial intelligence partition

  • In total 80 nodes with a total peak performance of 2.7 Petaflops
  • Each node has
    • Two latest generation Intel Xeon processors, code name Cascade Lake, with 20 cores each running at 2.1 GHz (Xeon Gold 6230)
    • Four Nvidia Volta V100 GPUs with 32 GB of memory each
    • 384 GB of main memory
    • 3.2 TB of fast local storage
    • Dual rail HDR100 interconnect network connectivity providing 200Gbps aggregate bandwidth
  • This partition is engineered to allow GPU intensive workloads to scale well to multiple nodes


Further information:


Allas - data management solution

CSC will offers a new common data management solution Allas for both new and old infrastructure. This system is based on CEPH object storage technology and it provides 12 PB of storage capacity and will be the backbone for providing a rich environment for storing, sharing and analyzing data across the CSC compute infrastructure.

Allas User Documentation in CSC Docs ►

Taito: HP Apollo 6000 XL230a/SL230s Supercluster

The Taito supercluster (taito.csc.fi) is intended for serial (single-core) and small to medium-size parallel jobs. There are also several "fat nodes" for jobs requiring a large amount of memory.

Taito consists of sixteen cabinets, with a total theoretical peak performance of 600 TFLOPS. Taito has been deployed in two phases, with first phase being decommissioned. The second phase is generally available until the end of 2019.

Second phase (available January 2015 - December 2019):

  • 407 Apollo 6000 XL230a Gen9 server blades, each with two 12 core Intel Xeon E5-2690v3 (Haswell) 2,6 GHz CPUs, for a total of 9768 cores
  • 128 GB of memory on normal nodes
  • 256 GB of memory on 10 "big memory" nodes

Decommissioned: First phase (available April 2013 - February 2019):

  • 576 HP ProLiant SL230s Gen8 servers each equipped with two 8 core Intel Xeon E5-2670 (Sandy Bridge) 2,6 GHz CPUs, totaling in 9216 cores.
  • 64 GB of memory on normal nodes
  • 256 GB (16 GB/core) of memory in 16 "big memory" nodes
  • 1,5 TB (48 GB/core) of memory in 2 "hugemem" nodes, with 32 cores each

The compute nodes are connected with a high-bandwidth, low-latency Infiniband FDR interconnect.

A subset of the compute nodes is allocated for the Pouta cloud service. The exact amount of nodes allocated for Pouta is adjusted depending on the demand for cloud resources.

Taito User Guide ►


Taito GPU

The Taito GPU system contains servers with NVidia GPU accelerators. These specialized processors are specifically designed for high performance computing and can provide superior performance compared to traditional CPUs. However, to utilize the capabilities fully, one needs to either have an existing application that is compatible with the processors or perform the porting and optimization work.

CSC and other European HPC centers provide regular courses on porting and optimizing for these architectures.

The GPU nodes are generally available until the end of 2019. In 2020 the P100 GPU nodes will be migrated to cPouta cloud.

The following GPU resources are currently available:

  • 12 nodes with 2 NVidia K80 GPUs in each node
    • The K80 GPU cards have each 2 GPUs so there are GPUs per node, these are all connected to the first CPU
    • 2 Xeon E5-2680 v3 CPUs with 12 cores each running at 2,5 GHz
    • 256 GB of DDR4 memory
    • 850GB of HDD scratch space
  • 20 nodes with 4 NVidia P100 (Pascal) GPUs in each node
    • The number of nodes may change as they are shared with cPouta
    • The P100 GPUs are connected in pairs to each CPU
    • 2 Xeon E5-2680 v4 CPUs with 14 cores each running at 2,4 GHz
    • 512 GB of DDR4 memory
    • 2 x 800 GB of Sata SSD scratch space

Access and usage instructions can be found in the Taito user guide (chapter NVidia GPU (Taito-GPU)).


Sisu: Cray XC40 Supercomputer (decommissioned)

Sisu has been decommissioned on 19.8.2019.

The Sisu supercomputer (sisu.csc.fi) was from 2012 to 2019 the most powerful supercomputer in Finland and one of the most powerful in Northern Europe.  It will be replaced by the new Puhti and Mahti supercomputers.

See also