Linux Networx PC-Cluster Phobos (Outdated)¶
This page is deprecated! Phobos is a former system which was shut down on 1 November 2010.
Phobos is a cluster based on AMD Opteron CPUs. The nodes are operated
by the Linux operating system SuSE SLES 9 with a 2.6 kernel. Currently,
the following hardware is installed:
|CPUs||AMD Opteron 248 (single core)|
|total peak performance||563.2 GFLOPS|
|Number of nodes||64 compute + 1 master|
|CPUs per node||2|
|RAM per node||4 GB|
All nodes share a 4.4 TB SAN. Each node has additional local disk space mounted on
jobs for the compute nodes are scheduled by a Platform LSF batch system running on
the login node
Two separate Infiniband networks (10 Gb/s) with low cascading switches provide the infrastructure for low latency / high throughput data traffic. An additional GB/Ethernetwork is used for control and service purposes.
Phobos is based on single-core AMD Opteron 248 processor. It has the
following basic properties:
|clock rate||2.2 GHz|
|floating point units||2|
|peak performance||4.4 GFLOPS|
|L1 cache||2x64 kB|
|L2 cache||1 MB|
|memory bus||128 bit x 200 MHz|
The CPU belongs to the x86_64 family. Although it is fully capable of running x86-code, one should always try to use 64-bit programs due to their potentially higher performance.