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Open Issues

Known issues from the Edison CLE 6 upgrade

October 10, 2017 by Zhengji Zhao

The myquota command was made available on Edison on 10/9/2017. 

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Fortran buffered I/O with Intel compilers is no longer enabled by default on Edison

October 10, 2017 by Zhengji Zhao

This problem was fixed in the Intel/18.0.0.128 module, which was made available during the Edison maintenance (10/6/2017 - 10/9/2017) and was set to default.

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MPI-3 Atomic Performance Degradation since cray-mpich/7.3.0

September 28, 2017 by Zhengji Zhao

Cray has fixed this performance issue in cray-mpich/7.6.0 (release date: July 6, 2017). So the two environment variables and linking to the dmapp library are not needed anymore. The two environment variables have been deprecated. More detail can be found at the CDT 17.06 release note.

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The /scratc3 performance degradation after GridRaid upgrade

April 7, 2016

The Edison /scratch3 file system was upgraded to Grid Raid from MDRaid during the move to the CRT building (Dec, 2015). This upgrade was recommended by the vendors because it greatly enhances the drive rebuild time and write performance when compared to the traditional MDRaid that was deployed on Edison /scratch3 file system before the move (The /scratch1 and /scratch2 file systems are still in MDRaid). Unfortunately, we observed about two times I/O bandwidth degradation after the upgrade. We opened a bug against the vendors (Cray/Xyratex), and a bug fix has been worked out and will be released soon. We will apply the bug fix to the /scratch3 file system in one of the coming maintenances as soon as the fix is released. 

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Link error from craype/2.5.0

January 13, 2016 by Woo-Sun Yang

If you build a code using a file called 'configure' with craype/2.5.0, Cray build-tools assumes that you want to use the 'native' link mode (e.g., gcc defaults to dynamic linking), by adding '-Wl,-rpath=/opt/intel/composer_xe_2015/compiler/lib/intel64 -lintlc'. This creates a link error:

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