All Stories

Faster Fast Fourier Transforms in Python

A little while ago, we were approached by a researcher from the School of Mathematical Sciences with the classic request of “I’d like my code to run more quickly”. They were simulating a ball bouncing around a billiard table over the course of millions of collisions and analysing patterns in the path of the ball (this type of problem is...

in rse, Jun 11, 2021

Intel Parallel Studio XE 2020 update 4

The Intel Parallel Studio XE Cluster Edition 2020 update 4 suite is now installed and available on Apocrita. This release will be the last of the Parallel Studio releases we support, as Intel is moving to its “oneAPI” model of bundling.

in rse, Apr 22, 2021

Remote development on Apocrita with Visual Studio Code

Visual Studio Code (VS Code) is an open-source and lightweight text editor from Microsoft, and distinctly different from Visual Studio. In this short tutorial we aim to set up VS Code for remote interfacing and development on Apocrita, to edit, save, and manipulate our files and directories.

in rse, Feb 08, 2021

Parameterized derived types in Fortran - introduction

User-defined data types in Fortran may have parameters which control certain aspects of their definition. In this post we look at what these parameterized types are, how they are used and what benefits they may offer to the programmer.

in rse, Sep 10, 2020

Introducing Iain Stenson, RSE

Hello. I’m Iain, the newest recruit to the QMUL ITSR RSE team. We are the group of software engineers within ITS Research who help people at Queen Mary write readable, correct and high-performance research software.

in rse, Jul 13, 2020

SSH authentication and regaining access to Apocrita

In response to a coordinated security attack on HPC sites world-wide, it has been necessary to implement some changes to enforce a higher level of authentication security. In this article, we begin with providing some useful information to understand key-based authentication, and document the process for regaining access to the cluster; SSH keys and passwords were revoked for all users...

in tutorial, Jun 12, 2020

ITS Research FAQ regarding use of services during COVID-19 pandemic

As a result of the large-scale shift to remote working due to the COVID-19 pandemic, we have been asked various questions relating to computational research, which we’ll try to address below. We’ve seen an increase in the number of new account requests for the HPC service, and we realise there will be quite a few users wishing to run workloads...

in news, Mar 19, 2020

Apocrita newsletter - March 2020

Here is a round-up of recent QMUL HPC cluster news from the ITS Research team, including information about new compute nodes.

in news, Mar 01, 2020

Apocrita says Hello, world!: basic use of our cluster

A common first program to write in a new language is a “Hello world” example where we print a simple line of output. In this tutorial we first look at examples written in C, C++ and Fortran. To run the examples we’ll learn about interactive sessions on compute nodes, modules and compiling source code. We’ll also look at examples in...

in rse, Feb 12, 2020

Christmas Closure 2019

Please note that due to college closure for Christmas, there will be minimal customer support after Monday 23rd Dec 2019 until the college re-opens on the 2nd January 2020. Please exercise awareness of any impact your jobs may be having during this time, and practice good cluster etiquette. Any support tickets raised during this period will be dealt with on...

in news, Dec 20, 2019