Software development

Digging deeper into digital preservation

Author: Alistair Grant
Posted: 2 Sep 2013 | 19:20

A few months have gone by on the Pericles project (see my earlier post), more meetings have passed and more are coming up, but in between meetings, we do actually get some work done as well!

Preserving art, records and other items has been a challenge throughout history, not just how to store them but how to help future generations to understand them. Even in the short time digital art and records have been around, this problem has become increasingly apparent in modern technology. It is exacerbated by the rapid cycles that technology follows. Pericles is attempting to define and develop a framework or method to manage how digital data is stored in archives and how to keep the archives relevant and accessible. A small challenge it is not.

MPI: sending and receiving in multi-threaded MPI implementations

Author: Daniel Holmes
Posted: 5 Jul 2013 | 16:06

Have you ever wanted to send a message using MPI to a specific thread in a multi-threaded MPI process? With the current MPI Standard, there is no way to identify one thread from another. The whole MPI process has a single rank in each communicator.

CP2K-UK: Now recruiting!

Author: Iain Bethune
Posted: 20 Jun 2013 | 13:48

'CP2K-UK' is a new project starting shortly at EPCC, aiming to nurture the growth of a self-sustaining user and developer community around the CP2K materials science code here in the UK. I have been working on CP2K for nearly 5 years now thanks to a series of HECToR dCSE and PRACE projects, so it is great to get a chance to work on some of the more fundamental issues around usability and sustainability of the code, thanks to success in the EPSRC 'Software for the Future' call.

Making waves: TPLS code released as Open Source

Author: Iain Bethune
Posted: 10 Jun 2013 | 12:26

TPLS (Two-Phase Level Set) is a Computational Fluid Dynamics code developed by Dr Prash Valluri of the University of Edinburgh's School of Engineering and Dr Lennon Ó Náraigh of University College Dublin. It simulates the interface between two fluid phases, a phenomenon with a number of industrial applications including oil and gas hydrate transport, cleaning processes, distillation/absorption, and evaporative cooling of microelectronics.

Changing technology – thinking about digital preservation

Author: Alistair Grant
Posted: 7 May 2013 | 13:52

How do we deal with technology change? Ever thought about accessing the stuff you did twenty years ago? What’s that? You are having a hard time getting a floppy disk drive? Maybe the data format is unreadable or the media has been damaged? 8-inch, 5,25-inch, and 3,5-inch floppy disks: Public Domain 7 June 2009: George Chernilevsky

This is a problem that will continue to face us in many fields: how do you ensure that today’s data is still accessible in twenty or even fifty years' time? For a lot of areas, maybe we do not want to bother, it's the here and now that counts.

Opening OpenACC

Author: Ruyman Reyes Castro
Posted: 19 Apr 2013 | 10:57

Programmability of GPUs (or accelerators in general) has improved since the days of the OpenGL shaders. First CUDA, and OpenCL later, have evolved to offer a reasonable way of programming efficient algorithms onto GPUs. However, despite this improvement, there is still a lot of effort involved in the development of code for accelerators. This is inevitable sometimes: if you have a particular algorithm and you want to have the maximum performance possible for a particular accelerator architecture, and you have the time to do it, you can immerse yourself in the marvellous world of CUDA/OpenCL low-level optimisation and stop reading. If time is critical for you, as it is for me, then you will love the latest advance in accelerator programmability: OpenACC.

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