Field Notes

Experience from real life projects

  • Automated Deployment Pipeline 3 of 3

    Background We have previously covered a pipeline example with Jenkins calling Ansible to leverage OpenSSH configuration and Ansible inventory. We also discussed a use case…

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  • Automated Deployment Pipeline 2 of 3

    In this posting, we continue to discuss Jenkins’ ability to automate deployment routines. Jenkins supports freestyle project out of the box, as well as Pipeline…

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  • Automated Deployment Pipeline 1 of 3

    The business case You launched a software application. You installed it on two customer sites. You support the application mostly by SSH to customer server…

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  • Spark, Cassandra and Python

    In this post we touch briefly on Apache Spark as a cluster computing framework that supports a number of drivers to pipe data in, and…

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  • Host legacy application in Docker 1 of 2

    This is my notes from containerizing a legacy application with Docker compose. We have to run multiple instances of our application because we’re unable to…

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  • Java Garbage Collection

    Tuning the garbage collector is the most important thing that can be done to improve the performance of a Java application. GC is typically caused…

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