Recently, we have been having a problem with the ECDSA keys for our Spear nodes and Login nodes. If you have been using a recent version of Debian, Ubuntu, CentOS, or Redhat, you may have seen a message similar to the following when trying to connect to our services:
UPDATE Apr 21 - We are still working our Lustre issues. Spear and Lustre are still unavailable.
Yesterday (Sunday, April 19), the data center in Dirac suffered a brief power outage. Most systems are back online now, but there are lingering issues with the Lustre filesystem. This means that Spear systems are unavailable as well.
We are currently working on a solution, and will post an update as soon as we have resolved the issues.
This summer, we are going to replace the scheduling and job management software on the High Performance Computing Cluster with a new package called Slurm. Slurm will replace the current MOAB/Torque workload manager that we have been using for the past eight years. This will affect all HPC users.
A publication by Bin Chen, a member of applications group has been accepted for publication in the journal Astrophysical Journal Supplement Series. The article titled "Algorithms And Programs For Strong Gravitational Lensing In Kerr Space-time Including Polarization" used the HPC, Matlab and cython for performance analysis.