Krypton was decommissioned as an SMHI system on June 30th, 2015. SMHI production now uses Frost.


Byvind is operated for SMHI production. It follows in the footsteps of the earlier clusters Bore and Blixt.

Byvind has a combined peak performance of 12 Teraflop/sec on 1,120 compute cores. It is equipped with a fast interconnect network (Mellanox Infiniband QDR).

The system was delivered in 2010 by GoVirtual AB.

System Details

Hardware HP Cluster Platform SL170z G6 compute nodes
Processors 4-core Intel Xeon E5550 processors at 2.67GHz
Number of compute nodes 140
Compute nodes 2 sockets (8 cores) with 24 GB DDR3 1333 MHz memory
Login node 1 HP ProLiant DL180 G6 server, accessible using SSH
High speed interconnect Mellanox Infiniband QDR high-speed interconnect
Node scratch storage 13 TiB (100 GiB per node)
Global file system /home and /nobackup
Operating system CentOS Linux 5
Batch queue system Slurm

Byvind usage

Byvind is used for numerical weather prediction and similar production services.

Who can use Byvind?

Access to Byvind is granted by SMHI.

User Area

User support

Guides, documentation and FAQ.

Getting access

Applying for projects and login accounts.

System status

Everything OK!

No reported problems


NSC Express