hpc

Sharing resources with Grid technology

hpc, sagrid
The screen capture below is a good example of how ICTS's HPC is contributing towards the research community in South Africa through SAGrid.  Grid technology, in this instance the gLite middleware, allows portions of an HPC cluster to be…
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OpenMPI

hpc, MPI, programming
Installed openmpi 1.4-4 as well as the MPI development suite on the test cluter. Configured host based authentication to obviate the ssh password authentication. Compiled a test case program.  Seeing a 50% speed improvement when splitting the workload over 3…
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Comparative shopping

AWS, hpc
UCT-ICTS offers BL460 dual quad core CPUs with 2.4 GHz Xeon processors.  The blades come with either 16 or 32 GB of RAM, fiber channel HBAs and dual NICs.  Compared to Amazon each CPU gives approximately 2 EC2 compute units. …
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PBS POC upgrade test

hpc, torque
Tested the upgrade path of Torque from 2.5.3 to 3.0.0. Fairly easy, except one needs to remember a few things:
  1. shut down the pbs daemons before starting.
  2. run torque.setup to sort out the symlinks.
  3. restart the maui daemon.
All seems…
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HPC cluster fully utilized

hpc
Deployed stats and accounting package to Virtual Box test bed.  Doesn't work so well as Vbox hides various parameters from net-snmp. Another maths user has joined the UCT HPC cluster and started submitting jobs. Currently the cluster CPUs are 100%…
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Maths jobs submitted to HPC cluster

application, hpc, MPI
Our first user has started submitting jobs to the cluster.  The software being used is auto07p for continuation and bifurcation problems in ordinary differential equations.  Auto07 can be compiled with OMP to make it multi-cpu aware.  Currently each job makes…
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Parallel code, benefits and pit-falls

hpc, MPI, programming
Most high end platforms for high performance computing are equipped with multi-core CPUs.  In order to fully utilize the CPUs multiple jobs must be run on each platform or the code must be changed to utilize multiple CPUs.  There are…
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