Category Archives: Software

KVM Setup Overview

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 Server/LAN | 1 Comment

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

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 Java, Server/LAN, Software | 10 Comments

Flexible JDBC Realm for Glassfish

Approximately three years a go I started the development of a simple JDBC based security realm for Glassfish. The reason was that I was migrating from JBoss to glassfish and was running into problems with one application. That application simpy … Continue reading

Posted in Java, Software | 4 Comments

Move to Maven 3

Today I moved all my projects to maven 3.  The claim is that maven 3 is downwards compatible with maven 2, but have a look at the compatibility notes. The issues I ran into were: Parent resolution: Parents are no … Continue reading

Posted in Java, Software | Leave a comment

New Server Setup is Complete!

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

Posted in Server/LAN, Software | Leave a comment

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

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 Server/LAN, Software | 2 Comments

Java? Java bien, merci!

This is how anyone’s first French lesson should start!

Posted in Java, Software | Leave a comment

Kernel Virtual Machine (KVM) Benchmark Results

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 Server/LAN | 5 Comments

Benchmarking KVM continues…

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 Server/LAN | 1 Comment

Oh no, I’ve created a monster!

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

Posted in Server/LAN | Leave a comment