debug

Lock

Finding the key to your locks

Posted on 24 November 2016 by Thomas Green

Websites can be very useful for HPC to allow easier access. Recently we had an issue with a website we use and learned a few things on the way. Know your users A website has been running fine for a number of months – and building up a user base. However we recently hit an
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Perls of wisdom

Posted on 9 November 2015 by Thomas Green

It has been a long summer and it is time again to create a little post for a recent encounter on our supercomputer. Errors in Perl Perl is a common language which is very common within the Genomic communnity. Recently we had an interesting Perl issue where a job would just run for its maximum
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DRMAA

Working with DRMAA

Posted on 2 March 2015 by Thomas Green

Anyone who might have read earlier posts might have come across previous post on Galaxy. This used DRMAA to submit jobs when using a PBS Pro as a job scheduler. However recent issues whilst we upgraded our systems uncovered some unexpected issues with DRMAA. Going native with DRMAA First issue is with a feature of
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Bashing those script bugs

Posted on 20 November 2014 by Thomas Green

Recently we had a user report a problem where they had managed to start copying the complete filesystem of a compute node into their home directory. Fortunately for us we had setup quotas on our users home space so it stopped when it filled up their quota but it seemed it was all due to
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Arguments cause headaches

Posted on 27 August 2014 by Thomas Green

Having spent some time taking a look at a problem for a researcher where a program would quit with the dreaded: Segmentation fault (core dumped) It led to a common problem of argument chasing. Fortran arguments Fortran (unlike C) by default passes arguments by memory address (i.e. pointers).    This speeds up performance since it does
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