hpc

Maintenance feedback

Cloud, GPU, hardware, hpc, MPI, operating system
What went right?
  • The HPC rack was neatened up. This involved moving and consolidating servers, making space for PDU's and removing redundant cables that were impeding airflow. New HPC servers were installed. This task took two entire days as other
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Post maintenance work

hpc
Hex is back up although the CLOUD series servers are experiencing some networking problems.  Please let us know if you experience any issues running jobs on the 600 series. We did not succeed in virtualizing Hpc and hence access to…
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Data centre upgrade

hpc
Over the last few months the ICTS facilities team have been preparing for a large data centre upgrade on Upper Campus. The data centre has been rewired allowing for a second UPS supply to the racks as well as a
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Changes

application, hardware, hpc, operating system
Our users may have noticed that the hpc cluster dashboard is reflecting some infrastructure changes. Please note that this post refers to the older hpc cluster, not hex.  The 200 series are going to be decommissioned soon, and this is…
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Changes to HPC

hardware, hpc
Our older cluster, hpc.uct.ac.za is undergoing several changes. The 200 series will soon be decomissioned. The nodes are old, have insufficient core density and are inefficient power-wise compared to more modern servers.  The space in the racks is required for…
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Computational hours and MPI issues

application, hpc, MPI
Our clusters are currently computing more active hours that were processed in the first two years in total. Today we exceeded 300,000 CPU hours of work, that's more than 34 computational years being processed currently.   cumulative There are several MPI…
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Why are my jobs queuing?!?

hardware, hpc, maui, torque
Quite simply, our cluster is running at almost maximum capacity, and there's not much we can do about that.  It's always nice to be wanted though :-) Our strategy to deal with this is three-fold: 1) Shuffle user priorities to…
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