Archive for August, 2009

new tools-section

August 31st, 2009

For backup reasons I’ve uploaded a few of my often used vss-files to the server and linked those in the new tools – section. Here you can find hardware Visio shapes for server, storage and network systems and some software Visio shapes for Citrix application delivery infrastructure.

proxy in the clouds…

August 25th, 2009

Inspired by the article “Netz ohne Gesetz” (translated it would be “the outlawed web”), published in the well known german magazine, “Der Spiegel”, I’ve tried to setup a proxy in Amazon’s cloud. And after 20 minutes I had set-up two of them – one in the U.S. cloud (located in Seattle) and another one in the EU cloud (located in Dublin) of Amazon.

proxy-setting

two different proxies used...

The most interesting part was then to google some buzzwords and see how many hits one gets with an american ip and how many hits one gets with a european ip – in some cases there is a huge difference ;-)

For all of you who would like to try it yourselves, I’ve written a how-to, which you can download in the articles section of this site. Have fun…!

excerpt:

[...] This article describes the setup of a proxy-server in a cloud. You can use a proxy like this from everywhere through the internet. Reasons to do this could be:

  • Your internet access is filtered but you need access to sites which are filtered.
  • You want to have a log of all sites and files you’ve visited from different browsers.
  • You need to speed up your internet connection through caching.
  • You want to filter the internet access of your kids. [...]

calculations on VDIs…

August 15th, 2009

[For the german/original version - please click here.]

As a fan of saving energy in IT infrastructures, I have calculated how much energy one can save via implementing a VDI.  Below is a detailed VDI solution used as an example to prove exactly how much energy can be saved.   In order to better explain this, I will assume the following:

  • the system-integrator configures an automatic shutdown for the hypervizor overnight
  • no shared storage is used to store VMs because you don’t need high availability functions for all desktops
  • the workloads we have to  virtualize are average office users using a software that does not run on terminal servers but we can serve 4 desktops with one CPU-Core

» Read more: calculations on VDIs…