Archive for the ‘Research’ Category

Innovation im digitalen Ökosystem

Tuesday, December 4th, 2012

Die 6. Initiative des Internet und Gesellschaft Collaboratory, an welcher ich als Experte mitgearbeitet habe, hat den Abschlussbericht zum Thema “Innovation im digitalen Ökosystem” veröffentlicht. “Innovation ist kein technischer Vorgang, sondern ein komplexer sozialer Prozess, in dem ökonomische Interessen, gesellschaftliche und betriebliche Kräfteverhältnisse, kulturelle Normen und Wertvorstellungen und andere sogenannte „weiche“ Faktoren die entscheidende Rolle spielen. (more…)

Scalr 1.1.0 – getting in touch – Part II

Friday, August 21st, 2009

As I promised in a further post I document here in my blog further steps and experiences in running Scalr on an own server infrastructure.

After Scalr was set up as described in my first post, some additional configurations have to be done to get in detailed touch with Scalr 1.1.0.
First log in as admin user to the Scalr frontend and create a new system user (“Client”) and activate it. After successful login with the new created and active user, you have to enter your AWS credentials and upload your public and private key from your AWS account.

The next screenshot show the configuration within my user.
scalr system user AWS settings

Be aware to set this configuration right otherwise you will not be able to proceed.


TED: MIT Students Turn Internet Into a Sixth Human Sense

Sunday, August 16th, 2009

Would it not be awesome to have a “Sixth Sense” ? Read the interesting article TED: MIT Students Turn Internet Into a Sixth Human Sense — Video and get impressed how a “Sixth Human Sense” might look like in the future.

The research project site is available here.

Ian Foster – What’s faster–a supercomputer or EC2?

Wednesday, August 5th, 2009

I found this interesting article about a comparison today, you should read the whole article here:

  • On EC2, I am told that it may take ~5 minutes to start 32 nodes (depending on image size), so with high probability we will finish the LU benchmark within 100 + 300 = 400 secs.
  • On the supercomputer, we can use Rich Wolksi’s QBETS queue time estimation service to get a bound on the queue time. When I tried this in June, QBETS told me that if I wanted 32 nodes for 20 seconds, the probability of me getting those nodes within 400 secs was only 34%–not good odds.
  •, Ian Foster, Aug 2009


These comparisons depends from my point of view always on experienced data and mainly on your various scenario Neutral declarations are hard to find. I asked Thijs Metsch for some experienced data of RESERVOIR project he mentoined in Twitter. Looking forward for an answer from him…
Does anyone else have some own experienced data for starting EC2 images in different environments and with various scenarios?