Category Archives: Devops/Linux

Improvements to Snapshot Backup Scripts

Posted on August 11, 2011 by erik

The snapshot scripts that I blogged about earlier have undergone a number of important changes. I had been having a lot of problems with the cleanup of snapshot volumes and with the deletion of the old backup logical volumes. This … Continue reading →

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Git server setup on linux using smart HTTP

Posted on August 6, 2011 by erik

After seeing a presentation from Linus Torvalds I decided to read more about git. After looking into git more a I have decided to slowly move to git. New projects will be using git instead of subversion and I will … Continue reading →

Posted in Devops/Linux | 9 Comments

Processor evolution, will history repeat itself?

Posted on April 11, 2011 by erik

It is interesting to see what is going on in the industry with regard to the development of CPUs. In particular, the first dual core smartphones are being released right now and there are even quad core CPUs expected later … Continue reading →

Posted in Devops/Linux | 1 Comment

KVM Setup Overview

Posted on February 20, 2011 by erik

The server has been running stable now for quite some time in the new setup with several virtual machines providing the actual functionality using Kernel Virtual Machine. The setup is as follows. The host (falcon) is running a linux server … Continue reading →

Posted in Devops/Linux | 1 Comment

Two worlds meet (1): Automated creation of Yum Repos with Maven, Nexus, and Hudson

Posted on January 30, 2011 by erik

This is the first of a series of blogs titled ‘Two worlds meet’ talking about how two technologies can be used together to solve a problem. Mostly one world will be linux or more specifically a virtualized linux setup using … Continue reading →

Posted in Devops/Linux, Java, Software | 15 Comments

New Server Setup is Complete!

Posted on January 5, 2011 by erik

Over the past weeks I have spent huge amounts of time in setting up the new server, making sure that I preserve the complete functionality that I had before. My aim was to take my old server (i.e. server installation) … Continue reading →

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Sticky 911! Making it easy to quickly and reliably boot your linux OS from USB or CD/DVD

Posted on December 19, 2010 by erik

I have been isolinux in the past to boot my server. In fact, it used to be the only way to boot it because somehow my BIOS did not recognize the RAID card. That problem was solved later by a … Continue reading →

Posted in Devops/Linux, Software | 2 Comments

Kernel Virtual Machine (KVM) Benchmark Results

Posted on November 28, 2010 by erik

General Approach Over the past week, I have been doing benchmarking on KVM performance. The reason for this is that I want to use KVM on my new server and need to know what the impact of KVM is on … Continue reading →

Posted in Devops/Linux | 5 Comments

Benchmarking KVM continues…

Posted on November 23, 2010 by erik

After running quite a few tests with different configurations and doing also some manual testing, I am finding out that more or less the main factor in performance of KVM versus native is the disk IO. In particular, the schedulilng … Continue reading →

Posted in Devops/Linux | 1 Comment

Oh no, I’ve created a monster!

Posted on November 23, 2010 by erik

I have started to do benchmarking with virtual machines under opensuse 11.3 with KVM and had setup a number of different domains to run the same OS under different settings. Just one minor issue occurred which was that some domains … Continue reading →

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