May 2017

X windows and XQuartz on ARCHER

Author: Adrian Jackson
Posted: 30 May 2017 | 11:01

Paraview and ARCHERX Server

Every so often we get an ARCHER query where Paraview isn't working for somebody. As Paraview requires remote window functionality (X Servers) and can also do offscreen rendering and all sorts of other things, it can be complicated to get it working properly and efficiently. 

EPCC returns to Student Cluster Competition at ISC’17

Author: Emmanouil Farsarakis
Posted: 25 May 2017 | 12:10

The Student Cluster Competition is held three times a year, at Supercomputing, ISC High Performance and the Asia Student Supercomputing Challenge. EPCC has taken part in the past with great success and we're returning to the competition at ISC17 with a strong team of students from our MSc in High Performance Computing, and MSc in High Performance Computing with Data Science.

Balancing act: optimise for scaling or efficiency?

Author: Adrian Jackson
Posted: 24 May 2017 | 19:30

When we parallelise and optimise computational simulation codes we always have choices to make. Choices about the type of parallel model to use (distributed memory, shared memory, PGAS, single sided, etc), whether the algorithm used needs to be changed, what parallel functionality to use (loop parallelisation, blocking or non-blocking communications, collective or point-to-point messages, etc).

Speeding up Python on ARCHER

Author: Nick Johnson
Posted: 21 May 2017 | 16:12

45 minutes is a long time for a computer: 2,700 long seconds. For a supercomputer like ARCHER that's a lot of time to spend getting ready to do work, but this is the problem faced by the firedrake team who we work with as part of the Marine Technology project.

A better class of note

Author: Mario Antonioletti
Posted: 19 May 2017 | 08:21

This article covers what I think is a good way of taking notes, keeping track of them, and publishing them so that others can benefit from them or comment on your approach.

We often use notes to track what we have to do or have done. They might be in paper form or electronic text files. They document how we achieved our goal: the helpful URLs that put us on the right track, error and warning messages that were encountered and how they were resolved, etc. However, notes can quickly become intractable with recorded error and/or warning messages and unfathomably long URLs or, worse, they get lost.