Schlomo Schapiro

Am 26. und 27. Mai fand in Berlin die 5. Mailserver Konferenz bei Heinlein Support statt. Eine Konferenz von und für Spezialisten, war es für mich lohnen und hat mal wieder bestätigt, dass das gesamte Thema Email zwar nicht sehr kompliziert ist, in seiner Gesamtmasse and Details aber ziemlich komplex. Da in der iX mein Konferenzbericht erscheint, gibt es hier jetzt nur meinen Mitschrieb in Rohform.

Today I released the first part of our new Open Source Project YADT - an Augmented Deployment Tool . The configuration management with the help of RPM packages and a subversion repository is now available via the project repository . At the Subversion Day Berlin 2011 I gave a talk about how we do configuration management with RPM packages at ImmobilienScout24: Me showing the ImmobilienScout24 recruiting slide (Picture courtesy of H. Klotz) Download the slides as PDF for details: Subversion Day Berlin 2011 - Configuration Management with Subversion and RPM.pdf Read my conference reports: Subversion Day at Heise Developer SubGit at Heise Open

I just gave my talk at the LinuxTag 2011 about Self Service Virtualization as private Cloud and my new Open Source project Lab Manager Light . From the audience of about 80-100 people there where quite a few interesting questions and also several "I wish you had done that last year" comments. Download the slides: LinuxTag 2011 - Lab Manager Light - Self Service Virtualization as a Private Cloud.pdf

After I got very worked up again yesterday about people asking for "quick help" in setting up something and nobody thinking about the long term sustainability of IT operations I would like to point out a few facts about this topic: The major part of IT project costs are not related to the initial setup! Operations, maintenance, updates, bugfixes, application administration, backup and disaster recovery exercises make up the majority costs and should not be neglected in the initial planning. Actually, the more a project is meant to be temporary, the longer it will run and the more it will cost in the end. To underline my personal beliefs in this matter I found the following links on the Internet, I am sure that with some time on Google you can find even more: Distribution of Cost Over the Application Lifecycle - A Multi-Case Study This study show very nicely how up 60-90% of total project costs over 5 years are recurring costs ( Figure 3 ). Frequently Asked Questio...

On Tuesday, April 5th 2011, there was the first meeting of the devops Berlin XING group at ImmobilienScout24 where I also work. About 20 people showed up for an interesting mix of talks and open space. I got some very interesting and promising contacts and was happy to meet several people whom I had not seen for a long time. My own talk was about Package Deployment — Building Bridges between Dev and Ops and is available as a PDF download . The technology that we are building is available at the YADT project homepage and currently undergoing some rework before we can release it to the public.

Seems like a total waste of time without practical use? Well, it is — unless you need to test drive an idea that will be rolled out in your production data center running XEN PV but you have only VMware ESX as a playground. Since I spent a little time putting the pieces together I will share my experience based on CentOS 5.5 . Basically it all went es expected, I only had some trouble to get the XEN PV VMs into the regular network via bridging versus the NAT which is the default that comes with CentOS. Basic Setup: Configure your VMware VM to allow promiscuous networking: Allow promiscuous networking on the vSwitch Add this line of manual configuration to the Extended Configuration of the VM: ethernet0.noPromisc=“FALSE” Install regular CentOS and add the group "Virtualization": yum groupinstall Virtualization Make sure that there is enough free disk space in /var/lib/xen/images to store your virtual disk images. Network Setup:   Edit /etc/libvirt/qemu/networks/d...

Sitze gerade beim Ubuntu Berlin Stammtisch , und kann mal was dazu erzählen. Hier sind etwa 40 Leute, unklar wie viele zum Stammtisch kamen. Das ganze findet in der C-Base statt, aber das ist eine Thema für sich. Schade, dass da viel geraucht wird, damit ist die Veranstaltung wohl für Leute unter 18 tabu. Und es stinkt weil kaum Lüftung. Die erste Stunde war eher langweilig, es haben sich einige Grüppchen gebildet aber nix gemeinsames für alle. Scheinen aber alles echt nette Leute zu sein. Hab dann festgestellt, dass der Mensch neben mir quasi Konzernkollege ist und schon gab es ein spannendes Gespräch und einen interessanten Kontakt. Also alles in allem ein lohnender Abend und klare Empfehlung, mal wieder zu kommen. Hoffentlich ist der Laden dann auch rauchfrei.

I just got an idea that it might be interesting to combine mod_dims and GPU accelerated image manipulation libraries like NVidia's NPP . Apparently nobody looked into this so far, even though a google search will show a lot of GPU related image processing stuff , NVidia also provides a nice intro to GPU image processing . The idea is that if it would be possible to service scaled images as fast as unscaled images then it would be possible to skip all the solutions that deal with the caching of scaled images and just scale the images always on demand. This depends on the ability to service scaled images really fast, for example with the help of some Tesla boards for the image scalers. It would be an interesting comparison to compare the cost of sufficiently available storage for caching plus the cost for elastic on-demand scaling with the cost of permanent on-demand scaling with GPU acceleration. The advantage of the latter would be, if the costs are in the same region, that i...

www.immomapplet.de ist ein praktisches Add-On für die Immobiliensuche auf ImmobilienScout24 . Einfach da suchen, wo man eh wohnen will:-)