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Developer

Finding the key to your locks

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 […]

The art of restarting

The art of restarting

Posted on 27 April 2016 by Thomas Green

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 […]

Drop-in session at the Queen’s Buildings

Posted on 24 February 2016 by Andrew Williams

This Thursday (the 25th February), ARCCA will be holding a drop-in session in the Trevithick library room 1.15, from 2pm to 3.30pm. These drop-in sessions are an opportunity for the […]

Rose and Managing Workflows

Rose and Managing Workflows

Posted on 9 December 2015 by Andrew Williams

How would you like a tool that would allow you to: A Rose workflow in progress. Write and maintain workflows more efficient and sophisticated than an existing job submission script. […]

Perls of wisdom

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 […]

Research seminar – Accelerating computing

Research seminar – Accelerating computing

Posted on 2 July 2015 by Thomas Green

Using accelerators such as GPUs and Intel Phi technologies are becoming a popular method to extend the performance of certains codes. ARCCA is holding a research seminar which covers this […]

Floating in numbers

Floating in numbers

Posted on 26 June 2015 by Thomas Green

Just like an iceberg, floating point numbers can have hidden danger lurking just under the surface. A recent email through a mailing list reminded me about the subtlties of handling […]

Working with 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. […]

Docking to Docker

Docking to Docker

Posted on 2 February 2015 by Thomas Green

Another month has passed and we have been very busy in ARCCA at Cardiff University with installation of the new hardware and installing new services. These are a few of […]

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 […]