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Monitoring the monster with RHQ

The classical RHQ setup assumes an agent and agent plugins being present on a machine (‘platform’ in RHQ-speak). Plugins then communicate with the managed resource (e.g. ...
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ARM Virtualization Extensions – Memory and Interrupts (Part 2)

In the first part of this series, I introduced the topic of virtualization. Today I will venture deeper into the ARM virtualization extensions for memory management and handling of ...
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Basic concepts of OpenLDAP

LDAPLDAP is just a type of database specialized for look ups. Reads are fast while writes are supported but relatively slow. That’s why LDAP is commonly used to store centralized ...
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Basic IPv6 concepts

Basic concept IPv6 is a completely separate protocol from IPv4! It means that the configuration and operation of IPv6 have nothing to do with those of IPv4 at all. They will run independently ...
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ARM Virtualization Extensions – Introduction (Part 1)

Sorry guys for another hiatus, my job at Calxeda keeps me busy. I was recently discussing ARM’s virtualization support with my friend Ali Hussain (yup, that’s our idea of a fun ...
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Virtual Host + Nginx + Tomcat

In my Virtual Host + Apache httpd server + Tomcat + mod_jk connector post has lots of comments. and i hope everyone like that. But problem is very difficult to install and configure ...
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Tomcat Clustering Series Part 5 : NginX as Load Balancer

This is my fifth part of the Tomcat Clustering Series.[Check the video below for better understanding]. In this post we are going to discuss how to replace Apache http load balancer ...
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Releasing more often drives better Dev and better Ops

One of the most important decisions that we made as a company was to release less software, more often. After we went live, we tried to deliver updates quarterly, because until then ...
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Good & Bad Patterns in Development and Operations

As part of my role at a new company I’ve been asked to provide feedback about structuring Dev & Ops as well as what sorts of things work and don’t. I certainly don’t claim ...
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Continuous Deployment: Are You Afraid It Might Work?

I’ve been wondering for a few years now, why it’s so hard to get companies to prioritize the work that I feel is important. I mean, I’m telling you how to do it and you aren’t ...
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