Author Archives: frederik

Does Denmark need a science cloud?


4 years ago we, the ScienceCloud group at DeIC, launched the scientific data-management service

It was a first attempt at building something like this out of open-source components: FreeBSD, ZFS, Apache, ownCloud/Nextcloud and involved engaging with similar projects in other countries (Switzerland, Australia, Germany, Holland) and open-source environments (Nextcloud, CS3).

Today this service hosts about 100 TB of … Read the rest

Sciencedata open for testing


This is the intended replacement for our old workhorse, Those who would like to try out new features targeted at researchers, please give it a try. You’ll need to be able to log in via wayf/edugain, i.e. you need to be affiliated with a European research institution.

The new features we’re exploring are:

- ORCID integration
- ZenodoRead the rest

What’s worse than ODBC?


The classic “Process (aka Designing the Stop Sign)” nails the problem of (Over-) Design By Committee.

But is the real problem here using a committee? Can design not be meaningfully accomplished by group of people working together?

I claim the answer is yes and that typical problem is not the committee per se, but the clueless committee – regardless … Read the rest



This time we landed the catch, Pablo’s first – a beautiful sea trout from Sakskøbing Fjord. A great finale to this years summer vacations. Click on the picture (and log in) to see more.

Booting Ubuntu-14.04 cloud images without a cloud


So, Ubuntu-14.04, Trusty Tahr, is out; and booting the cloud images requires a bit more hacking than booting the 12.04 cloud images. Here goes:

Get the image, resize and loop-back mount it:

qemu-img convert -c -O qcow2 trusty-server-cloudimg-amd64-disk1.img trusty-server-cloudimg-amd64-disk1_30GB.qcow2
qemu-img resize trusty-server-cloudimg-amd64-disk1_30GB.qcow2 30G
sudo modprobe nbd
sudo qemu-nbd -c /dev/nbd0 `pwd`/trusty-server-cloudimg-amd64-disk1_30GB.qcow2
ls image || mkdir image
sudo … Read the rest

Does Denmark need a supercomputer?

The more precise question is:

Do researchers at Danish universities need a supercomputer on the top-500 list?

A bit of background is useful:

The funding model for HPC in Danish academia, employed since ~2000, described in a previous post, has resulted in a decentralized HPC infrastructure which AFAIK is quite unique in Europe (other European countries have a

Read the rest