Apache ActiveMQ® is the most popular open source, multi-protocol, Java-based message broker. It is widely used in a lot of multi service application environments where we need to pass messages between services. All this type of environments (kubernets, docker swarm etc. ) are used to be able to monitor and control the component services using… Read More »
In a high load system deployed on Jboss Application Server the following optimizations for data source pool resources may be needed. 1. Change the minimum and maximum pool size of a data source (MyDS). This will ensure that we always have a minimum number of allocated connections and also we set a threshold to the… Read More »
Often times I find trying to start Edge on an old data-center jump station and I just click and nothing happens. This is the direct result of an Edge process that went zombie. A quick way to kill an Edge session that is acting as a zombie and will not allow you to start a… Read More »
A common mistake is to set the alternatives just for java sdk. This can lead to issues when several java versions are present. Jasper Reports a well knows Java library used to generate ad-hoc pdf reports compiles the report templates and the temporary classes using the default system javac not the javac of the java… Read More »
The magic command is upower, a command that gives you detailed information about the power devices in your laptop/desktop. Enumerate all the power devices Check the details of a power device (battery in this case)
RabbitMQ is a nice message queue server used in lot of networking monitoring appliances and other services. It has a very small footprint and can be integrated with lots of languages and resources. All works well until you get the famous recovery log corrupted error. Usually the issue is caused by disk full or in… Read More »
We all hate that time when we start to have a disk failure. In one of my RAID10 one disk was at some point in the failed status. That should be an immediate concern for you. A 4 disks RAID10 setup can deal with 1 disk failure and even with 2 disk failures if they… Read More »
JBoss applications server is a very nice and powerful Java application server from RedHat. To make it really useful in a modern architecture of a complex software product we must prepare JBoss to be very easily deployed in a cluster environment. The simplest way to do it is to write some basic Bash scripts that… Read More »
ActiveMQ is a very nice and powerful open source, multi-protocol, Java-based message broker. It is a very popular software used to bridge between loose components of an environment that consists of several services. To make it really useful in a modern architecture of a complex software product we must prepare ActiveMQ to be very easily… Read More »
We all know back-up is important and a must have in case of critical systems. Making a backup on tape is one of the best industry standards that is still unmatched. In the following I am presenting a simple way to make tape back-ups using tar and LTFS on LTO5 and up tapes. Why LTFS… Read More »