United nations assembly.

Training

Posted on 13th January 2017 by

Did you know that ARCCA presents a series of training courses every year, ranging from getting started with Linux, all the way up to using parallel programming techniques to get the most out of Raven? In between these two extremes we have a number of courses on the general day-to-day use of Raven that will
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Lock

Finding the key to your locks

Posted on 24th November 2016 by

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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RAF Roundel

Mods and rockers

Posted on 29th September 2016 by

Modules are used on many supercomputers since it allows multiple versions of software to be easily chosen to be loaded into a users environment. We would now like to show how modules work on our supercomputer since we apply some tricks to try and make maintaining them easier and make them “rock” even more. What
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Carrots

What’s up, Doc?

Posted on 19th August 2016 by

I am not sure whether Bugs Bunny was refering to documentation but we shall assume it does for this post. Documentation can be a dreaded or loved term which may require a carrot or stick approach to get it done, but the method to create and manage documentation can have an impact on whether documentation
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Image of restart icon

The art of restarting

Posted on 27th April 2016 by

Limits on runtimes Running jobs on a supercomputer can sometimes involve letting the job run for a long time. A long time in this instance is longer than the default expected maximum runtime for a particular type of job. At Cardiff we have 2 types of jobs which we have setup our supercomputer for. Serial
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Developing Software

Posted on 25th April 2016 by

The next ARCCA drop in session at the Queen’s buildings will be occuring this Thursday, the 28th April at 2pm in the Trevithick library room 1.15. This is up the stairs from the Trevithick reception, in through the main library entrance and straight ahead until you get to the study rooms on the left. The
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Drop-in Session Summary

Posted on 29th February 2016 by

Many thanks to all the attendees who made last Thursday’s drop-in session at the Queen’s Buildings such an interesting discussion. After some initial battles with a VGA cable I was able to give a quick presentation about Rose, our workflow manager, prompting a good deal of interest and some penetrating questions. This was followed up
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The sensitivity of interferometric gravitational wave detectors depends on the direction of the source. Courtesy of Sathyaprakash.

Waving hello to gravity

Posted on 22nd February 2016 by

The recent announcement, see BBC article, by LIGO (Laser Interferometer Gravitational-Wave Observatory) of the observation of gravitational waves by their detectors in September 2015 has been described as one of the biggest scientific discoveries in years. LIGO involves a consortium of scientists from around the world, including the group of researchers at Cardiff University. This
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graph-viewer

Rose and Managing Workflows

Posted on 9th December 2015 by

How would you like a tool that would allow you to: Write and maintain workflows more efficient and sophisticated than an existing job submission script. Create dependency trees of tasks that will run at the click of a button, with automatic optimisation so that multiple tasks may be run in parallel. Revision control your tasks
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