Accelerating the development of Node.js using OpenShift

In this blog entry, I want to introduce a “different” way to work with OpenShift. In the typical way to deploy a Pod to OpenShift, we have available a set of very useful objects we have build/image configurations. This takes the pain from us by hiding the details about image construction but, sometimes we just want to see some code running in the cloud. Or we want to see if our service/application is able to interact with nearby services or we have some code but we don’t want to use a git repo just yet. To solve that problem, I will show the concept of InitContainers, and how by being a little bit creative we achieve some cool stuff like deploying our code inside a running container.

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Profiling NodeJS applications with Linux Performance Tools

Using Linux Perf Tools

The Performance Analysis Tool for Linux (perfis a powerful tool to profile applications. It works by using a mix of hardware counters (is fast) and software counters, all provided by the Linux Performance Counter (LPC) subsystem that takes charge of the complex task of wrapping the CPU counters for the different type of CPUs. So you can have access to a very efficient way to get information of running processes through their C API or a convenient command in this case (perf).

This command gives you access to a great variety of system and process level events but in this entry, I will use it to investigate CPU bounded issues.  

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