Owens

System Downtime December 15 2020

A downtime for all OSC HPC systems is scheduled from 7 a.m. to 9 p.m., Tuesday, December 15, 2020. The downtime will affect the Pitzer and Owens Clusters, web portals, state-wide licenses, and HPC file servers. Login services will not be available during this time, including MyOSC. In preparation for the downtime, the batch scheduler will begin holding jobs that cannot be completed before 7 a.m., December 15, 2020.

Environment changes in Slurm migration

As we migrate to Slurm from Torque/Moab, there will be necessary software environment changes.

Decommissioning old MVAPICH2 versions

Old MVAPICH2 including mvapich2/2.1, mvapich2/2.2 and its variants do not support Slurm very well due to its life span, so we will remove the following versions:

  • mvapich2/2.1
  • mvapich2/2.2, 2.2rc1, 2.2ddn1.3, 2.2ddn1.4, 2.2-debug, 2.2-gpu

As a result, the following dependent software will not be available anymore.

HOWTO: Debugging Tips

This article focuses on debugging strategies for C/C++ codes, but many are applicable to other languages as well.

Rubber Duck Debugging

This approach is a great starting point. Say you have written some code, and it does not do what you expect it to do. You have stared at it for a few minutes, but you cannot seem to spot the problem.

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