Linux Networx PC-Farm Deimos (Outdated)

Warning

This page is deprecated! Deimos is a former system!

The PC farm Deimos is a heterogeneous cluster based on dual core AMD Opteron CPUs. The nodes are operated by the Linux operating system SuSE SLES 10 with a 2.6 kernel. Currently, the following hardware is installed:

Component	Count
CPUs	AMD Opteron X85 dual core
RAM per core	2 GB
Number of cores	2584
total peak performance	13.4 TFLOPS
single chip nodes	384
dual nodes	230
quad nodes	88
quad nodes (32 GB RAM)	24

All nodes share a 68 TB on DDN hardware. Each node has per core 40 GB local disk space for scratch mounted on /tmp. The jobs for the compute nodes are scheduled by the Platform LSF batch system from the login nodes deimos.hrsk.tu-dresden.de .

Two separate InfiniBand networks (10 Gb/s) with low cascading switches provide the communication and I/O infrastructure for low latency / high throughput data traffic. An additional gigabit Ethernet network is used for control and service purposes.

Users with a login on the SGI Altix can access their home directory via NFS below the mount point /hpc_work.

CPU

The cluster is based on dual-core AMD Opteron X85 processor. One core has the following basic properties:

Component	Count
clock rate	2.6 GHz
floating point units	2
peak performance	5.2 GFLOPS
L1 cache	2x64 kB
L2 cache	1 MB
memory bus	128 bit x 200 MHz

The CPU belongs to the x86_64 family. Since it is fully capable of running x86-code, one should compare the performances of the 32 and 64 bit versions of the same code.